Robbins, A.M.J. A versatile, low-cost drying kiln for opening pine cones / by A.M.J. Robbins. -- Humlebaek : Danida Forest Seed Centre, 1985. -- vi, 54 s. : obr., tab., príl. ; 30 cm. -- (C. F. I. occasional papers ; NO. 26). -- Obalový názov. -- ISBN 0-85074-083-5 (brož.) : 70.00 Sk

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