Profitable growing without soil
Hollis, H.F.
Profitable growing without soil by H.F. Hollis - London English University Press 1964 - 198 p.
Soilless Growth
631.548 / H 742 P
Profitable growing without soil by H.F. Hollis - London English University Press 1964 - 198 p.
Soilless Growth
631.548 / H 742 P