Some quantitative dental characteristics of the chimpanzee, gorilla and orang-outang / by E. H. Ashton and S. Zuckerman. — London : Cambridge University Press for the Royal Society, 1950. — С. 471―484, [1] л. іл. — (Philosophical transactions of the Royal Society of London. Biological sciences ; vol. 234, № 616) - Ashton, E. H. (Philosophical transactions of the Royal Society of London, 1950)