Shadows over the land
Discusses the causes of different kinds of pollution, the ways in which they endanger the environment, and some of the solutions to the pollution and conservation crisis.
| Prif Awdur: | |
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| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
New York
Seabury Press
[1970]
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| Pynciau: |