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You searched for: Creator Personal Names Pierre, W. H. (William Henry), 1898- Remove constraint Creator Personal Names: Pierre, W. H. (William Henry), 1898- Creator Personal Names Pohlman, G. G. (George Gordon), 1902- Remove constraint Creator Personal Names: Pohlman, G. G. (George Gordon), 1902- All Creators Pierre, W. H. (William Henry), 1898- Remove constraint All Creators: Pierre, W. H. (William Henry), 1898- All Subjects Phosphorus in agriculture. Remove constraint All Subjects: Phosphorus in agriculture. All Subjects Sap. Remove constraint All Subjects: Sap. All Subjects Soils--Phosphorus content. Remove constraint All Subjects: Soils--Phosphorus content.

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