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Dollah M.A., . and Zolkepli O., . and Ariffin M., . and Adnan S., . (1993) Effect of changing photoperiod on estrous cyclicity of exotic ewes. [Proceedings Paper]
Dollah M.A., . and Ramlah A.H., . and Wan Zahari M., . and Engku Azahan, . and Hilmi M., . and Dahlan I., . (1993) Animal production strategies in the challenging environment. The Malaysian Society of Animal Production, Selangor Malaysia. ISBN 967-936-176-4