TY  - BOOK
AU  - Helmstadater, G C
TI  - Principles Of Psychological Measurement
U1  - 150 
PY  - 1964///
CY  - Kottayam
PB  - NATIONAL BOOKSTALL
KW  - GENERAL STACK
KW  - PHILOSOPHY & PSYCHOLOGY
KW  - PSYCHOLOGYGeneralia
ER  -