The value of progesterone, oestradiol benzoate and cloprostenol in controlling the timing of oestrus and ovulation in dairy cows and allowing successful fixed-time insemination von Gyawu, P., Ducker, M.J., Pope, G.S., Saunders, R.W., Wilson, G.D.A.

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Evaluation of an ultrasonic pregnancy detector von Ducker, M.J., Haggett, R.A., Fairlie, F.J., Rowe, G.J., Yarrow, N.H., Jackson, N.W.

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Oestrone Sulphate in Milk of Pregnant Dairy Cows von Bloomfield, G.A., Morant, S.V., Ducker, M.J.

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