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Author(s): Nijhoff, G. C. Title: [Time of ovulation and conception as a basis of periodic abstention in marriage] Subject(s): Birth control Technique: Safe period [ Knaus-Ogino ] Journal Title Abbreviation: Ned. tschr. geneesk. Date of Publication: 1931 Pagination: 75: pt 1, 578–86. Language: Dutch Type of Resource: Analytic Series/Volume/Page: Series 4/Volume 2/Page 339 - 40203391110
Author(s): Remmelts, R. Title: [Periodical sterility in women] Subject(s): Birth control Technique: Safe period [ Knaus-Ogino ] Journal Title Abbreviation: Geneesk. tschr. Ned. Indië Date of Publication: 1932 Pagination: 72: 818 Date of Publication: 1934 Pagination: 74: 412. Reference Note: Also Ned. tschr. verlosk., 1931–32, 35: 233; 1934, 37: 63. Language: Dutch Type of Resource: Analytic Series/Volume/Page: Series 4/Volume 2/Page 339 - 40203391200
Author(s): Smulders, J. N. J. Title: [Practical results from periodical abstinence by Ogino-Smulders method] Subject(s): Birth control Technique: Safe period [ Knaus-Ogino ] Journal Title Abbreviation: Ned. tschr. geneesk. Date of Publication: 1934 Pagination: 78: 3767–73. Language: Dutch Type of Resource: Analytic Series/Volume/Page: Series 4/Volume 2/Page 339