by Simmins P.H, Edwards S.A, Spechter H.H
Published in Animal Production (1994)

by Wathes C.M, Spechter H.H, Bray T.S
Published in Journal of Agricultural Science (1982)

by Corning, S, Spechter, H.H
Published in BSAP occasional publication (01.01.1987)

by Furniss, S.J, Edwards, S.A, Lightfoot, A.L, Spechter, H.H
Published in British veterinary journal (1986)

by Furniss, S J, Edwards, S A, Lightfoot, A L, Spechters, H H
Published in British veterinary journal (01.09.1986)

by Edwards, S.A, Armsby, A.W, Spechter, H.H. (Terrington Experimental Husbandry Farm, ADAS, Terrington St Clement, Kings Lynn PE34 4PW (UK))
Published in Animal Production (UK) (1988)

by Hill, J.A, Charles, D.R, Spechter, H.H, Bailey, R.A, Ballantyne, A.J. (Agricultural Development and Advisory Service, Woodthorne, Wolverhampton, WV6 9QT (UK))
Published in British Poultry Science (UK) (1988)