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Brooding habitat selection of himalayan snowcock(Tetraogallus himalayensis) in the Yanchiwan Nature Reserve, Gansu Province PLANT SEX ALLOCATION AND THE MAINTENANCE OF SPECIES DIVERSITY IN PLANT COMMUNTTIES The study on theory of international cooperation in environmental science Outline of Gymnospermous Medicinal Plants in China A PHENOLOGICAL STUDY ON MAIN TREE SPECIES OF MONTANE HUMID EVERGREEN BROAD LEAVED FOREST IN AILAO MOUNTAINS The nest-site selection of himalayan snowcock(Tetraogallus himalayensis) in the Dongdashan Nature Reserve, Gansu Province