Yankelovich, Daniel.
Facetas ; No. 58 - Washington-XXU : International Communicational Agency United States of America, 1982. - p. 61-68 : il. - Trimestral - No. 58(1982). - Facetas ; No. 58 . - International Communicational Agency United States of America. .
Facetas ; No. 58 - Washington-XXU : International Communicational Agency United States of America, 1982. - p. 61-68 : il. - Trimestral - No. 58(1982). - Facetas ; No. 58 . - International Communicational Agency United States of America. .