Thonner`s analytical Key to the families of flowering Plants. - R Geesink; A.J.M Leeuwenberg C.E Ridsdale J.F Veldkamp (Hague PUDOC,Center for Agricultural Publishing & Documentation, 1981)
R Geesink; A.J.M Leeuwenberg; C.E Ridsdale & J.F Veldkamp: Thonner`s analytical Key to the families of flowering Plants.. Hague. PUDOC,Center for Agricultural Publishing & Documentation, 1981. 90-6021-461-7--(583.003GEE)
ENGLISH