Kaufmann, Berwind Petersen, McDonald, Margaret R., Gay, Helen, Okuda, N. C., Pennoyer, Jessie M., Blowney, S. (December 1949) Organization of the chromosome. Annual Report of the Director of the Department of Genetics, Carnegie Institution of Washington Year Book No. 48, 1948-1949. pp. 176-185.
Kaufmann, Berwind Petersen, McDonald, Margaret R., Gay, Helen, Wilson, Katherine, Wyman, Ruth, Okuda, N. (December 1948) Organization of the chromosome. Annual Report of the Director of the Department of Genetics, Carnegie Institution of Washington Year Book No. 47, 1947-1948. pp. 144-155.
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