25. | | Autor: CAHEN, François | |
26. | | Autor: Sanford, Frank E. | |
27. | | Autor: Clarke, Edith | |
28. | | Autor: Croft, Terrell | |
29. | | Autor: Carslaw, H. S. Jaeger, J. C. | |
30. | | | |
31. | | Autor: Dahl, O. G. C. | |
32. | | Autor: Gall, D. C. | |
33. | | Autor: Lyon, Waldo V. | |
34. | | Autor: Prince, D. C. | |
35. | | Autor: Campbell, Albert | |
36. | | Autor: Wagner, C. F. e outro | |