TY  - BOOK
AU  - National Reprographic Centre For Documentation
ED  - National Reprographic Centre For Documentation
TI  - Investigation of the exposure of Diazo Duplicate Negativews by W J Barreett
U1  - 20bM1495, L11 
PY  - 1971///
CY  - Hatfield
PB  - NRCD       
KW  - LIBRARY SCIENCE
ER  -