TY  - BOOK
AU  - Mitzel, Harold E.
TI  - Encyclopedia of Educational research .-5th ed .-0-02-900450-0
SN  - 0-02-900450-0
U1  - R370.7803 E.E.R. 
PY  - 1982///
CY  - THE  Free Press, New York
ER  -