TY  - BOOK
AU  - Helmstadter, G. C. 
AU  - Lemke, Elmer  
AU  - Wiersma, W. 
TI  - Principles of Psychological Measurement
SN  - 0137096674, 
U1  - 152 
PY  - 1964///
CY  - New York
PB  - Appleton-Century-Crofts, 
KW  - Psychology
N1  - With charts; Includes index
ER  -