1. Vitamin A deficiency in the germ-free rat;Beaver;Am. J. Path.,1961
2. Effects of vitamins A and D on resistance to infection;Boynton;J. Nutr.,1931
3. Periodontal tissue changes in vitamin A deficient young rats;Fransden;Acta odont. scand.,1963
4. Experiments on vitamin A deficiency in rats and the quantitative determination of vitamin A;Gudjonsson;Acta. path. microbiol. scand.,1930
5. The post-natal development of the rat submaxillary gland;Jacoby;J. Anat.,1959