00357nam a22000857a 4500245015000000260006600150300001000216650002300226650002200249  aVision and hearing screening in selected classes for the mentally retarded city of Detroit, Michigan /cUS Dept. of Health, Education and Welfare  aMichigan :bUS Dept. of Health, Education and Welfare,c1966.  a10 p.  aMental retardation  aHearing screening