Hawkins, R. R. (1950). Scientific, medical, and technical books published in the United States of America, 1945-48: A selected list of titles in print, with annotations. Supplement.
Chicago-referens (17:e uppl.)Hawkins, Reginald Robert. Scientific, Medical, and Technical Books Published in the United States of America, 1945-48: A Selected List of Titles in Print, with Annotations. Supplement. Washington, D.C, 1950.
MLA-referens (9:e uppl.)Hawkins, Reginald Robert. Scientific, Medical, and Technical Books Published in the United States of America, 1945-48: A Selected List of Titles in Print, with Annotations. Supplement. 1950.
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