Hamdan Osman. Variasi dunia orkid : panduan penanaman & penjagaan / Dunia orkid Hamdan Osman. - Shah Alam : Alaf 21, 2008. - 175 p. : col. ill. ; 28 cm. ISBN: 9789831243466 9831243463 Subjects--Topical Terms: Orchids.Orchid culture.Orchid culture.Orchids. Dewey Class. No.: 635.9344