TY  - BOOK
AU  - Crosby,Muriel
TI  - Supervision: as co-operative action
U1  - 371.2 21st
PY  - 1957///
CY  - New York
PB  - Appleton-Century-Crofts
KW  - Supervised study; Education-Curricula; Teaching-Aids and devices
ER  -