Handbook of Plant Nutrition, Second EditionAllen V. Barker, David J. Pilbeam · First published 2015Open the Tome
Efficient use of nitrogen on crop land in the NortheastAllen V. Barker · First published 1980Open the Tome
A study of growth and chemical composition of corn plants as related to nitrogen and potassium nutritionAllen V. Barker · First published 1962Open the Tome
Peripheral Vascular DiseasesAllen, Edgar V., Nelson W. Barker, and Edgar A. Hines, Jr. · First published 1962Open the Tome
Peripheral vascular DiseasesEdgar V. Allen, Nelson W. Barker, and Edgar A. Hines · First published 1946 · Latest edition 1949Open the Tome
