TY  - BOOK
T1  - The education of exceptional children its challenge to teachers, parents, and laymen.
T2  - McGraw-Hill series in education.
A1  - Heck, Arch Oliver 1887-
LA  - English
PP  - New York
PB  - McGraw-Hill
YR  - 1953
ED  - 2d ed.
UL  - https://ds.mainlib.upd.edu.ph/Record/UP-99796217603633733
OP  - 513
CN  - LC 3965 H4 1953
KW  - Children, Abnormal and backward.
KW  - Precocity.
ER  -