TY  - BOOK
AU  - Sears, Paul B
AU  -  Quillen, I. James
AU  -  Hanna,  Paul R
TI  - This useful world
U1  - 900 
PY  - 1941///
CY  - Chicago
PB  - Scott, Foresman
KW  - Social sciences
KW  - Social sciences--Research
N1  - Includes index
ER  -