Frey, E 1959: Flechtenflora und -vegetation des Nationalparks im Unterengadin. II. Teil: Die Entwicklung der Flechtenvegetation aud photogrammetrisch kontrollierten Dauerflachen. - Ergeb. der wiss. Untersuch. des schweiz. Nationalparks, N.F.6(41): 237-319. [RLL List # 31 / Rec.# 6017] Keywords: PHYTOSOCIOLOGY/ SWITZERLAND/ NATIONAL PARKS/ PHOTOGRAPHIC TECHNIQUES
Abstract: 24 tab. 19 fig. 80 photographs. [Many lichens, some bryophytes.]
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