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
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Keller, Edward A.
Natural Hazards: Earth's Processes as Hazards, Disasters, and Catastrophes
Pearson-Prentice Hall, 2006
 Buku Teks SO