@book{ BA03925760, author = "International Symposium on Statistical Ecology and Patil, Ganapati P. and Pielou, E. C. and Waters, William E.", title = "Many species populations, ecosystems, and systems analysis", publisher = "Pennsylvania State University Press", year = "1971", series = "The Penn State statistics series", number = ". Statistical ecology ; v. 3", URL = "https://ci.nii.ac.jp/ncid/BA03925760" }