TY  - BOOK
AU  - Wallen,Carl
TI  - Effective classroom management: Abridged edition
SN  - 0-205-05985-6
U1  - 428.007 
PY  - 1978///
CY  - E.U.A.
PB  - Allyn and Bacon
N1  - BIBLIOTECA: UACH-FFYL
ER  -