The universe around us,
Wedi'i Gadw mewn:
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
Cambridge [Eng.] New York,
The University press; The Macmillan company,
1944.
|
| Rhifyn: | 4th ed., rev. and reset. |
| Pynciau: |
| Disgrifiad Corfforoll: | x, 297 p. illus., XXXII pl. on 16 l., diagrs. 22 cm. |
|---|