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- [1] EDGE-NOTCHED CARDS OR PEEK-A-BOO CARDS FOR DOCUMENTATION NACHRICHTEN FUR DOKUMENTATION, 1967, 18 (02): : 53 - 53
- [2] COMBINED APPLICATION OF A PEEK-A-BOO CARDS AND EDGE NOTCHED CARDS FOR DOCUMENTATION OF BIOLOGICAL OBJECTS NACHRICHTEN FUR DOKUMENTATION, 1967, 18 (05): : 185 - 185
- [4] A FURTHER POSSIBILITY FOR REPRODUCTION OF PEEK-A-BOO CARDS FOR IMMEDIATE DOCUMENTATION NACHRICHTEN FUR DOKUMENTATION, 1967, 18 (3-4): : 123 - 123
- [5] VALUE AND PUBLICATION TECHNIQUE OF A DOCUMENTATION SERVICE BASED ON PEEK-A-BOO CARDS NACHRICHTEN FUR DOKUMENTATION, 1967, 18 (02): : 50 - 50
- [7] PUNCHES WITH AN ELECTROMAGNETIC DRIVE FOR EDGE-PUNCHED AND PEEK-A-BOO CARDS NAUCHNO-TEKHNICHESKAYA INFORMATSIYA SERIYA 1-ORGANIZATSIYA I METODIKA INFORMATSIONNOI RABOTY, 1974, (06): : 18 - 18
- [8] SORTERS OF EDGE-NOTCHED CARDS NAUCHNO-TEKHNICHESKAYA INFORMATSIYA SERIYA 1-ORGANIZATSIYA I METODIKA INFORMATSIONNOI RABOTY, 1969, (07): : 34 - &