Stein, B. – Stein’s Orchideenbuch. Beschreibung, Abbildung und Kulturanweisung der empfehlenswertesten Arten.

Detailled description of hundreds of orchids from Acampe to Zygosepalum, tha names are in Latin and German. 184 orchids are with illustration. – The first 60 leaves with two signes of impressions, otherwise a fine copy. – Stefleu & Cowan 12.927.