The span of gestation and the cause of birth : a study of the critical period and its effects in mammalia / by John Beard.
- Beard, John, 1858-1924.
- Date:
- 1897
Licence: Public Domain Mark
Credit: The span of gestation and the cause of birth : a study of the critical period and its effects in mammalia / by John Beard. Source: Wellcome Collection.
Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.
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