| "The chilling requirement in apple and its role in regulating Time of flowering in spring in cold-Winter Climate" | Modeling and Simulation: Proceedings of the Annual Pittsburgh Conference |
|---|---|
| Washington State Apple Advertising Commission | Apples: Botany, Production and Uses |
Historical Geography of Crop Plants: A Select Roster.
| Washington State Apple Advertising Commission | |
|---|---|
| Pittsburgh Section, University of Pittsburgh School of Engineering, School of Engineering, Institute of Electrical and Electronics Engineers Pittsburgh Section, Instrument Society of America, Instrument Society of America Pittsburgh Section, University of Pittsburgh 1981 | Soma: Divine Mushroom of Immortality |
The Encyclopedia of horticulture corporation.
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