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Plant variety protection act hearing, Ninety-first Congress, second session, on S. 3070 ... June 11, 1970
- "Plant variety protection act. Hearing, Ninety-first Congress, second session, on S. 3070 ... June 11, 1970"
- "Plant variety protection act hearing, Ninety-first Congress, second session, on S. 3070 ... June 11, 1970"
- "Plant variety protection act hearing, Ninety-first Congress, second session, on S. 3070 ... June 11, 1970"@en