SUMMITT ROBERT L. / red./ 534,869 SEX Sex differentiation and chromosomal abnormalities. Ed-s: Robert L. Summitt, Daniel Bergsma. Ass. ed-s: Joe Leigh Simpson, Natalie W. Paul New York 1978 Alan R. Liss 8° s. XVII, nlb. 3,434, il. The National Foundation- March of Dimes Birth Defects: Original Article Ser., vol. 14, nr 6C Part C of Annual Review of Birth Defects