PN C99040-08-1988 Photographic black-and-white developers Qualitative and usable characteristic of developers in powder for use in arts of printing DUG-06 (331-06)
1988PN C99040-08-1988 Photographic black-and-white developers Qualitative and usable characteristic of developers in powder for use in arts of printing DUG-06 (331-06)