Robbins, A.M.J. Seed extraction 1 : the tarpaulin method of sun drying pine cones and seed extraction / by A.M.J. Robbins. -- Humlebaek : Danida Forest Seed Centre, 1994. -- 7 s. : obr. ; 30 cm. -- (Technical Note ; No. 9). -- (brož.) : 20.00 Sk

630*232.3+630*232.31+630*232.312.2
ZV001