GENERAL BIOLOGICAL SUPPLY HOUSE, INC.
Turtox service leaflet. No. 51. Hydroponics, growing plants in nutrient solutions without soil.
GENERAL BIOLOGICAL SUPPLY HOUSE, INC. Turtox service leaflet. © CCM: General Biological, Inc (PWH) No. 51. Hydroponics, growing plants in nutrient solutions without soil. © 15Sep41; AA377631. 30Apr69; R460867.
CCM: General Biological, Inc|PWH