(1990). Proceedings of the 11th annual conference on hydroponics: March 30-April 1, 1990 Hotel Vancouver British Columbia Canada. Vancouver: Hydroponic Society of America.
Citación estilo ChicagoProceedings of the 11th Annual Conference On Hydroponics: March 30-April 1, 1990 Hotel Vancouver British Columbia Canada. Vancouver: Hydroponic Society of America, 1990.
Cita MLAProceedings of the 11th Annual Conference On Hydroponics: March 30-April 1, 1990 Hotel Vancouver British Columbia Canada. Vancouver: Hydroponic Society of America, 1990.
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