1. Culling and replacement systems for laying cage operations;Abplanalp,1956
2. The influence of decreasing photo-periods on egg production during the raising of egg-laying chicks;Benus,1967
3. Effect of photoperiod on the response of developing pullets to different nutritional treatments;Berg;Poultry Sci.,1963
4. Biellier, H. V., and O. W. Ostman, 1960. Effect of varying day-length on time of oviposition in domestic fowl. Missouri Agr. Exp. Sta. Res. Bul. 747.
5. Attempts to delay the sexual maturity of early-season Leghorn pullets;Bornstein;Hassadeh,,1962