The relationship between age, the amount of egg-shell damage and the occurrence of egg-shell faults in two commercial flocks /
Belyavin, C. G.
Harper Adams Poultry Hubandry Experimental Unit.
Newport : Harper Adams Poultry Husbandry Experimental Unit,
1978.
"Paper prepared by Mr. C.G. Belyavin for publicarion in the Eggs Authority technical bull. no. 3 (November, 1978) entitled "Some further studies on eggs and egg quality."