C. B. Schreck, Lackey, R. T., and M. Hopwood, L.,
“Evaluation of Diel Variation in Androgen Levels of Rainbow Trout, Salmo gairdneri”,
Copeia, vol. 1972, no. 4, p. 865, 1972.
C. B. Schreck, Lackey, R. T., and M. Hopwood, L.,
“Plasma oestrogen levels in rainbow trout Salmo gairdneri Richardson”,
Journal of Fish Biology, vol. 5, no. 2, pp. 227 - 230, 1973.