TY  - BOOK
TI  - Cultural Patterns and technical change : : from the tensions and technology series / 
PY  - 1961///.
CY  - New York : 
PB  - United Nations Educational Sientific; Cultural OrganizatiÃ³n, 
N1  - CatalogaciÃ³n preliminar.; Texto en inglÃ©s.
ER  -