University of California. (1978). Plant growth regulators: Study guide for agricultural pest control advisors. University of California.
Tohutoru Kātū Chicago (17th ed.)University of California. Plant Growth Regulators: Study Guide for Agricultural Pest Control Advisors. Berkeley: University of California, 1978.
Tohutoro MLA (9th ed.)University of California. Plant Growth Regulators: Study Guide for Agricultural Pest Control Advisors. University of California, 1978.
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