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Gordon, Dr. Myron. Siamese fighting fish. Jersey City, New Jersey: T.F.H. Publications, 1956.
Siamese fighting fish
Klee, Albert J. "Sex hormones and the Guppy," The Aquarium, Volume 34, (March, 1965), 25-30.
Pickford, Grace E. and James W. Atz. The physiology of the pituitary gland of fishes. New York: Zoolog- ical Society, 1957.
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Schmidt, Edward. "Sex reversal in spayed female bettas," Tropical Fish Hobbyist, (November, 1962), 21-24.
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