TY  - BOOK
AU  - Baal J Van
TI  - Symbols for communications :  An introduction to   
T2  - Studies of Developing Countries
U1  - Y:3(Q), L1 
PY  - 1971///
CY  - Assen
PB  - Koninklijke van Goreum and Comp      
N1  - Bibliography: P 281-293
ER  -