Altitudinal changes in the incidence of crassulacean acid metabolism in vascular epiphytes and related life forms in Papua New Guinea. - Earnshaw, ,M..J.,.; Winter, ,K.,.; Ziegler, ,H.,.; Stichler, ,H.,.; Cruttwell, ,N..E. G.,.; Kerenga, ,K.,.; Cribb, ,P..J.,.; Wood, ,J.,.; Croft, ,J..R.,.; Carver, ,K..A.,.; and Gunn, ,T..C.. (Oecologia, 1987)