1. The participation of the corpus luteum and uterus in the implantation of the transplanted egg;Bernstein;Bul. de Biol, et de Med. Expt. de l'URSS,1938
2. Über einige das Geburtsgewicht der Säugetiere beeinflussende Faktoren;Bluhm;Arch. f. Entwickl. Mech. der Organ.,1929
3. Studies on monozygous cattle twins. V. The effect of different plans of nutrition on growth and body development of dairy heifers;Bonnier;Acta Agric. Suecana,1946
4. Variations in farrow: with special reference to the birth weight of pigs;Carmichael;Ill. Agr. Expt. Sta. Bul.,1920