13. | | Autor: Torres, Isabel | |
14. | | Autor: Sousa, Alfredo e | |
15. | | | |
16. | | | |
17. | | Autor: American Power, Conference | |
18. | | Autor: Cunha, Luís Veiga da | |
19. | | Autor: Toutain, Caroline | |
20. | | Autor: Torres, Isabel | |
21. | | Autor: Budyko, Michael I. Ronov, Alexander B. Yanshin, Alexander L. | |
22. | | Autor: Meadows, Donella H. | |