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Subjects
- Books25
- Periodicals as Topic22
- Emotions -- physiology13
- Pamphlets13
- Beall, Lester, 1903-1969.11
- Advertising as Topic10
- Facial Expression10
- Biological Evolution8
- Sex Characteristics8
- Genetic Variation6
- Birds5
- Brain -- anatomy & histology5
- Columbidae5
- Dogs5
- Key, Axel, 1832-1901.5
- Aggression -- physiology4
- Chickens4
- Infant4
- Pigmentation4
- Women4