| 1 |
The earth : its shape, size, weight and spin / by J.H. Poynting
Cambridge : Cambridge University Press , 1913
|
| 2 |
The sun / by R. A. Sampson
Cambridge : Cambridge University Press , 1914
|
| 3 |
The making of leather / by Henry R. Procter
Cambridge [U.K.] : Cambridge University , 1914
|
