Biometrical observations on Populus ×canadensis Moench (Salicaceae) leaves Journal title: Annals of West University of Timisoara, ser. Biology Authors: Rodica BERCU Subject(s): Plant Sciences, Ecology, Biology, Education & Educational Research, Environmental Studies, Agriculture, Multidisciplinary, Biochemistry & Molecular Biology, Zoology, Biodiversity Conservation, Developmental Biology, Meteorology & Atmospheric Sciences