South African Journal of Animal Science On-line version ISSN 2221-4062
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TYLER, N.C. and GOUS, R.M..The effect of constant photoperiod on testis weight and the use of comb area to predict testis weights in broiler breeders males. S. Afr. j. anim. sci. [online]. 2008, vol.38, n.2, pp. 153-158. ISSN 2221-4062.