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| Schaffer, N.E.; Beehler, B.A., 1990. Preliminary studies on the anatomy and ultrasonic images of the reproductive structure of three species of rhinoceros (Rhinoceros unicornis, Diceros bicornis, Ceratotherium simum). Proceedings of the American Association of Zoo Veterinarians 1990: 242-248, 2 figures, 1 table
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| Schaffer, N.E.; Beehler, B.A., 1988. Overview of procedures and results of semen collection from ambulatory rhinoceroses. Proceedings of the AAZPA Annual Conference 1988: 273-279, tables 1-5
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