TY - BOOK AU - Douglas,James Sholto TI - Beginner's guide to hydroponics: soilless gradening SN - 0720715075 (hardback) AV - SB126.5 D68 PY - 1984/// CY - London PB - Pelham Books Ltd KW - Hydroponics KW - Soilless culture N1 - Includes index ER -