SAURE NADELWÄLDER (PFLANZENGESELLSCHAFTEN); ACID CONIFEROUS FORESTS (PLANT SOCIETIES); MONOGRAPHELLA NIVALIS + FUSARIUM NIVALE + GERLACHIA NIVALIS (PLANT PATHOLOGY); SUBALPINE VEGETATION + MONTANE VEGETATION + KOLLINE VEGETATION (PFLANZENGESELLSCHAFTEN); TUJETSCH, TAVETSCH (KANTON GRAUBÜNDEN); PROTECTION FORESTS + PROTECTIVE FORESTS (FORESTRY); SCHUTZWÄLDER (FORSTWIRTSCHAFT); FOREST REGENERATION + FOREST-STAND FORMATION (SILVICULTURE); TUJETSCH, TAVETSCH (CANTON OF GRISONS); EXTERNAL FACTORS AND STRESS (BOTANY); LIGHT AND RADIATION EFFECTS (PLANT ECOLOGY); ÄUSSERE FAKTOREN UND STRESS (BOTANIK); LICHT- UND STRAHLENWIRKUNG (PFLANZENÖKOLOGIE); WALDVERJÜNGUNG + BESTANDESGRÜNDUNG (WALDBAU); DAVOS, KREIS UND ORT (KANTON GRAUBÜNDEN); DAVOS, SUB-DISTRICT AND LOCALITY (CANTON OF GRISONS); SUBALPINE VEGETATION + MONTANE VEGETATION + COLLINE VEGETATION (PLANT SOCIETIES); MONOGRAPHELLA NIVALIS + FUSARIUM NIVALE + GERLACHIA NIVALIS (PHYTOPATHOLOGIE)