| 其他書名 | An Investigation in Costa Rica and India. Prodipto Roy, Frederick B. Waisanen, Everett M. Rogers. Report of a Research Project Initiated by Unesco |
| 出版 | Unesco, Hyderabad, India, National Institute of community development, 1969 |
| URL | http://books.google.com.hk/books?id=hJaQQwAACAAJ&hl=&source=gbs_api |