Wood, J. T.
1954a. The distribution of poisonous snakes in Virginia. Virginia Jour. Sci., 5(3):152-167, 4 maps.
1954b. A survey of 200 cases of snake-bite in Virginia. Amer. Jour. Trop. Med. and Hyg., 3(5):936-943.
Wood, J. T., Hoback, W. W., and Green, T. W.
1955. Treatment of snake venom poisoning with ACTH and cortisone. Virginia Med. Month, 82:130-135.
Wright, A. H., and Wright, A. A.
1957. Handbook of snakes of the United States and Canada. Comstock Publ. Assoc., Cornell Univ. Press, 2:ix + 565-1106 pp.
Yamaguti, S.
1958. Systema helminthum. Interscience Publ., Inc., New York, 3 vols., 5 parts, 1:xi + 1575 pp., 2:vii + 860 pp., 3:1261 pp.
Yerger, R. W.
1953. Yellow bullhead preyed upon by cottonmouth moccasin. Copeia, 1953(2):115.