Banks, Ferdinand E.
The economics of natural resources
Plenum Press, 1976
 Buku Teks SO
Abbott, Patrick L.
Natural disasters
McGraw-Hill, 2009
 Buku Teks SO
Banks, Ferdinad E.
The economics of natural resources
Plenum Press , 1976
 Buku Teks SO
The Natural resources of Flores Island / edited by Herwint Simbolon
Research and Development Center of Biology, 1998
 Buku Teks SO
Nicholson, Max
The environmental revolution : a guide for the new masters of the world
Penguin Books, 1970
 Buku Teks