1.
Earth stewardship : linking ecology and ethics in theory and practice / ed. Ricardo Rozzi... [et al.]
2.
Código de ética edp / EDP. Energias de Portugal
3.
Civismo das massas (Directorial) / Hermínio Duarte Ramos
Autor:
Ramos, Hermínio Duarte
Data:
Abr. 1998
4.
Environmental philosophy : from animal rights to radical ecology / ed. Michael E. Zimmerman