1. McKusick VA, Eldridge R, Hostetler JA, Ruangwit U, Egeland JA (1965) Dwarfism in the Amish. II. Cartilage-hair hypoplasia. Bull Johns Hopkins Hosp 116:285–326
2. Bias WB, Light-Orr JK, Krevans JR et al (1969) The Stoltzfus blood group, a new polymorphism in man. Am J Hum Genet 21:552–558
3. Hsu SH, Pollard MK, Chan MM, Bias WB (1981) Genetic heterogeneity of DR4 in the old order Amish and two new HLA-D specificities. Hum Immunol 2:165–172
4. Gale AN, Lacassie Y, Rogers JG, Levin LS, McKusick VA (1977) Two “new” autosomal recessive mental retardation syndromes observed among the Amish. Birth Defects Orig Artic Ser 13:127–138
5. Juberg RC, Davis LM (1970) Etiology of nondisjunction: lack of evidence for genetic control. Cytogenetics 9:284–293