Gaya APA
Natural resources and development. (1975).
[s.l]:
Institute for Scientific Co-operation1.
Gaya Chicago
Natural resources and development.
.
[s.l]:
Institute for Scientific Co-operation1,
1975.
Text.
Gaya MLA
Natural resources and development.
.
[s.l]:
Institute for Scientific Co-operation1,
1975.
Text.
Gaya Turabian
Natural resources and development.
[s.l]:
Institute for Scientific Co-operation1,
1975.
Print.