Scientists & inventors
Presents 160 chronologically arranged biographies of scientists and inventors with emphasis on their particular contributions to the progress of mankind.
| Prif Awduron: | , |
|---|---|
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
New York
Facts on File
c1979.
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| Pynciau: |