PN C99225-02-1985 Light sensitive photographic materials for art of printing (typography) Usable-qualitative characteristic of papers for typestting and photolettering devices
1992PN C99225-02-1992 Photography Usable-qualitative characteristic of papers for typesetting and photolettering devices used in art oi' printing (typography)
1985PN C99225-02-1985 Light sensitive photographic materials for art of printing (typography) Usable-qualitative characteristic of papers for typestting and photolettering devices