A guide to the orchids of Sikkim : being a guide to the identification of those species of orchids found between the Terai and the northern frontier of independent Sikkim including the Chumbi Valley and British Bhutan - Brühl, Paul Johannes 1855-1935 (Dehra Dun : Bishen Singh Mahendra Pal Singh, 1978)
Keywords: ORQUÍDEAS -- IDENTIFICACIÓN -- SIKKIM (INDIA); BOTÁNICA -- SIKKIM (INDIA)