| 其他書名 | A Fourth Grade Unit in Geography ; a Paper Read at the Fifty-fourth Annual Meeting of the National Council for Geographic Education, Kansas City, Missouri, November 2, 1968 |
| 出版 | Geography Curriculum Project, University of Georgia, 1968 |
| URL | http://books.google.com.hk/books?id=BLRUAQAACAAJ&hl=&source=gbs_api |