/cgi-bin/koha/opac-search.pl?idx=&q=au%3A%22Obourn%20Ellsworth%20S%22&sort_by=relevance&format=rss 19 0 50 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=1346665 By Brown Kenneth E.
Washington, USA U.S. Government Printing Office 1959 .
viii,101p.

]]> Place hold on Qualifications and teaching loads of mathematics and science teachers in Maryland, New Jersey, and Virginia

]]> /cgi-bin/koha/opac-detail.pl?biblionumber=1346665 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=1342431 By Brown Kenneth E.
Washington, USA U.S. Government Printing Office 1959 .
viii,101p.

]]> Place hold on Qualifications and teaching loads of mathematics and science teachers in Maryland, New Jersey, and Virginia

]]> /cgi-bin/koha/opac-detail.pl?biblionumber=1342431 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=77935 By Obourn Ellsworth S.
1963 .
p. cm..

]]> Place hold on Discovering: the world of science

]]> /cgi-bin/koha/opac-detail.pl?biblionumber=77935 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=1370051 By Heiss Elwood D.
New York, USA The Macmillan Company 1950 .
viii,462p

]]> Place hold on Modern science teaching

]]> /cgi-bin/koha/opac-detail.pl?biblionumber=1370051 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=1368539 By Heiss Elwood D.
New York, USA The Macmillan Company 1950 .
viii,462p

]]> Place hold on Modern science teaching

]]> /cgi-bin/koha/opac-detail.pl?biblionumber=1368539 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=1350733 By Heiss Elwood D.
New York, USA The Macmillan Company 1950 .
viii,462p

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]]> /cgi-bin/koha/opac-detail.pl?biblionumber=1350733 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=1322396 By Heiss Elwood D.
New York, USA The Macmillan Company 1940 .
351p.

]]> Place hold on Modern methods and materials for teaching science

]]> /cgi-bin/koha/opac-detail.pl?biblionumber=1322396 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=1372196 By Heiss Elwood D.
New York, USA The Macmillan Company 1950 .
viii,462p

]]> Place hold on Modern science teaching

]]> /cgi-bin/koha/opac-detail.pl?biblionumber=1372196 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=1369811 By Heiss Elwood D.
New York, USA The Macmillan Company 1950 .
viii,462p

]]> Place hold on Modern science teaching

]]> /cgi-bin/koha/opac-detail.pl?biblionumber=1369811 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=1369765 By Heiss Elwood D.
New York, USA The Macmillan Company 1950 .
viii,462p

]]> Place hold on Modern science teaching

]]> /cgi-bin/koha/opac-detail.pl?biblionumber=1369765 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=1368540 By Heiss Elwood D.
New York, USA The Macmillan Company 1950 .
viii,462p

]]> Place hold on Modern science teaching

]]> /cgi-bin/koha/opac-detail.pl?biblionumber=1368540 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=1344410 By Heiss Elwood D.
New York, USA The Macmillan Company 1950 .
viii,462p

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]]> /cgi-bin/koha/opac-detail.pl?biblionumber=1344410 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=1342481 By Obourn Ellsworth S.
Washington, USA U.S. Government Printing Office 1962 .
iv,84p.

]]> Place hold on Research in the teaching of science July 1957-July 1959

]]> /cgi-bin/koha/opac-detail.pl?biblionumber=1342481 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=1371776 By Heiss Elwood D.
New York, USA The Macmillan Company 1950 .
viii,462p

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]]> /cgi-bin/koha/opac-detail.pl?biblionumber=1371776 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=1371737 By Heiss Elwood D.
New York, USA The Macmillan Company 1950 .
viii,462p

]]> Place hold on Modern science teaching

]]> /cgi-bin/koha/opac-detail.pl?biblionumber=1371737 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=1370404 By Heisss Elwood D.
New York, USA The Macmillan Company 1950 .
viii,462p.

]]> Place hold on Modern science teaching: A revision of modern methods and materials for teaching science

]]> /cgi-bin/koha/opac-detail.pl?biblionumber=1370404 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=1342777 By Obourn Ellsworth S.
Washington, USA U.S. Government Printing Office 1958 .
55p.

]]> Place hold on Analysis of research in the teaching of science July 1955-July 1956

]]> /cgi-bin/koha/opac-detail.pl?biblionumber=1342777 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=1347155 By Obourn Ellsworth S...(et.al)..
Washington, USA U.S. Government Printing Office 1960 .
ix,70p

]]> Place hold on General facilities and equipment: Science and mathematics in public high schools 1958, Part 1

]]> /cgi-bin/koha/opac-detail.pl?biblionumber=1347155 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=1343067 By Obourn Ellsworth S.
.
45p.

]]> Place hold on Analysis of research in the teaching of science july 1956-july 1957

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