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The population explosion and the green revolution hearings before a subcommittee of the Committee on Appropriations, House of Representatives, Ninety-second Congress, first session
- "The population explosion and the green revolution : hearings before a subcommittee of the Committee on Appropriations, House of Representatives, Ninety-second Congress, first session, [Thursday, May 13, 1971]"
- "The population explosion and the green revolution : Hearings before a subcommittee of the Committee on Appropriations, House of Representatives, Ninety-second Congress, first session"
- "The population explosion and the green revolution hearings before a subcommittee of the Committee on Appropriations, House of Representatives, Ninety-second Congress, first session"@en