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Research for the world food crisis : a symposium presented at the Dallas meeting of the American association for the advancement of science, December, 1968 / ed. by Daniel G. Aldrich.
- American Association for the Advancement of Science,
- 1970.
- Washington, DC :
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Arid lands in transition / ed. by Harold E. Dregne.
- American Association for the Advancement of Science,
- 1970.
- Washington, DC :