TY  - BOOK
AU  - Levin,James
AU  - Nolan,James F.
TI  - Principles of classroom management: a hierarchical approach
SN  - 0136911714
PY  - 1991///
CY  - Boston
PB  - Allyn and Bacon
KW  - Classroom management
KW  - United States
KW  - Problems, exercises, etc
KW  - Teaching
ER  -