Suitability of hen eggs for incubation in the fresh state and after storage : review based on the study of 198 references / by V. V. Rol'nik ; transl. [from the Russian] by L. Weiss-Vladimirov ; [publ. in cooperation with the Spelderholt institute for poultry research, Beekbergen]Development of milk production in China in the 1980's / P.J.A. Gorissen and E.B. Vermeer