TY  - BOOK
AU  - Mitchell,Elmer D.
AU  - Mason,Bernard S.
TI  - The theory of play 
U1  - 370.892 
PY  - 1934///.
CY  - New York : 
PB  - A. S. Barnes and Company, 
KW  - Play
KW  - Physical education and training
N1  - Includes index.
ER  -