| 其他書名 | Final Report of the Microworlds Project Volume III. |
| 出版 | Department of Mathematics, Statistics and Computing, Institute of Education, University of London, 1991 |
| ISBN | 08547334429780854733446 |
| URL | http://books.google.com.hk/books?id=B7cWMwEACAAJ&hl=&source=gbs_api |