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37. [Use of a vacuum extractor instead of obstetric forceps]. CHACHAVA KV; VASHAKIDZE PD Akush Ginekol (Mosk); 1957; 33(6):11-5. PubMed ID: 13520445 [No Abstract] [Full Text] [Related]
38. An obstetrical forceps which uses a new principle of parallelism. SHUTE WB Am J Obstet Gynecol; 1959 Feb; 77(2):442-6. PubMed ID: 13617343 [No Abstract] [Full Text] [Related]
39. [Preliminary trial with A. P. Gumilevsky's obstetrical forceps]. LANKOVITS AV Akush Ginekol (Mosk); 1957; 33(1):32-3. PubMed ID: 13410740 [No Abstract] [Full Text] [Related]