TY  - BOOK
AU  - Mehrens, William A & Lehmann, Irvin  J
TI  - Measurement and evaluation: In ecucation and Psychology
SN  - 0-03-089966-4
U1  - 371.26 Meh 
PY  - 1975///
CY  - Holt Rinehart and Winston Inc, New York
ER  -