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Filtering by: Publisher Corvallis, Or. : Oregon State College, Agricultural Experiment Station Remove constraint Publisher: Corvallis, Or. : Oregon State College, Agricultural Experiment Station Creator Powers, W. L. (Wilbur Louis), 1887 Remove constraint Creator: Powers, W. L. (Wilbur Louis), 1887 Rights Statement No Copyright - United States Remove constraint Rights Statement: No Copyright - United States

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