TY - BOOK AU - National Reprographic Centre For Documentation ED - National Reprographic Centre For Documentation TI - Investigation of the effects of exposure to light on diazo microfilm by R N Broadhurst T2 - NRCD Publication; 5 U1 - 20bM1495, L68 (2) PY - 1976/// CY - Hatfield PB - NRCD KW - LIBRARY SCIENCE ER -