 | O'Connor, George A., 1944- 1n | (2) |
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 | O'Connor, George A., 1944- 1n; Reclamation of a sodium-affected soil with limited gypsum applications / . Las Cruces, N.M. : New Mexico State University, Agricultural Experiment Station, 1972. | |
| O'Connor, George A., 1944- 1n; Limited gypsum applications on sodic soils / . Las Cruces, N.M. : New Mexico State University, Agricultural Experiment Station, 1974. | |
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