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- [3] PATENT INFORMATION IN THE UNITED-STATES [J]. NACHRICHTEN FUR DOKUMENTATION, 1986, 37 (4-5): : 209 - 213
- [4] UNITED-STATES PATENT REQUIREMENTS [J]. IN VITRO-JOURNAL OF THE TISSUE CULTURE ASSOCIATION, 1981, 17 (12): : 1084 - 1085
- [7] RE - THE UNITED-STATES PATENT OFFICE [J]. JOURNAL OF THE PATENT OFFICE SOCIETY, 1956, 38 (04): : 291 - 294