TY  - BOOK
AU  - Cowan Henry J
AU  -  Smith Peter R
TI  - Environmental systems
U1  - U481:(G:55), M3 
PY  - 1983///
CY  - New York
PB  - Van Nostrand Reinhold Company U S A   
KW  - Human Geography
N1  - Appendix p. 227-30; Glossary p. 231-35
ER  -