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Search on : LEWIS, P.D. [Author]
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 Lewis, P.D., Middleton, B.A. and Gous, R.M. Supplementary radio noise advances sexual maturity in domestic pullets exposed to 7-h photoperiods. S. Afr. j. anim. sci., 2005, vol.35, no.3, p.180-185. ISSN 0375-1589
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 Lewis, P.D. et al. Simulated natural lighting and constant 14-hour photoperiods for broiler breeders during the rearing period, and interactions of lighting with body weight. S. Afr. j. anim. sci., 2005, vol.35, no.1, p.1-12. ISSN 0375-1589
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 Lewis, P.D., Danisman, R. and Gous, R.M. Male broiler performance and nocturnal feeding under constant 8-h or 16-h photoperiods, and various increasing lighting regimens. S. Afr. j. anim. sci., Mar 2008, vol.38, no.3, p.159-165. ISSN 0375-1589
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 Lewis, P.D., Gous, R.M. and Tumova, E. Broiler performance and bone strength minimally affected by either a simulated dusk or night-interruption photoperiod. S. Afr. j. anim. sci., 2010, vol.40, no.1, p.0-0. ISSN 0375-1589
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