Beginner's Guide to Hydroponics
by James Sholto Douglas
ISBN 13: 9780720715071
Format: Hardcover (144 pages) Publisher: Pelham Books Published: 09 Jul 1984
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Advanced Guide to Hydroponics (Soilless Cultivation)
ISBN 13: 9780720715712
Format: Hardcover (368 pages) Publisher: Pelham Books Published: Jan 1985