PN C99045-04-1986 Photographic black-and-white fixing agents Qualitative and usable characteristic of fixing agents in powder for films and papers used in art of printing DG-02 (31-02)
1986PN C99045-04-1986 Photographic black-and-white fixing agents Qualitative and usable characteristic of fixing agents in powder for films and papers used in art of printing DG-02 (31-02)