Niche strategies the prisoner's dilemma computer tournaments revisited by Marks, Robert E.

Breeding hybrid strategies optimal behavior for oligopolists by Marks, Robert E.

Agricultural research in the Asian and Pacific region : current situation and outlook.

Working papers in English as a second language

International travel by U.S. conservation groups and professional societies by Laarman, Jan G.

Economic consideration in nature-oriented tourism the case of tropical forest tourism . by Healy, Robert G.

PPR working papaers catalog of numbers 1 to 105.

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Women in development defining the issues. by Collier, Paul

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Population research in China an introduction and guide to institutes by Greenhalgh, Susan

Social science and population policy by Demeny, Paul