Opposite concepts such as full-empty, strong-weak, more-less are illustrated by several pairs of contrasting pictures.
| Author | Peter Spier |
| Publisher | World's Work |
| Year of publication | 1973 |
| Number of pages | 44 |
| Language | English |
| Format | Hardback |
| ISBN-10 | 437765091 |
| ISBN-13 | 9780437765093 |
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