00000nam 2200000za 4500 9.848939 CaOODSP 20241203113641 cr ||||||||||| 171215s1971 onc ||||o f000 0 eng d CaOODSP eng eng fre n-cn--- CW69-9/20-PDF Erskine, Anthony J., 1931- A preliminary catalogue of bird census studies in Canada [electronic resource] / by Anthony J. Erskine = Répertoire préliminaire des études de dénombrement des oiseaux du Canada / par Anthony J. Erskine. Répertoire préliminaire des études de dénombrement des oiseaux du Canada Ottawa : Canadian Wildlife Service = Service canadien de la faune, 1971. 77 p. Progress notes ; no. 20 = Cahiers de biologie ; n° 20 "January 1971." Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "The species composition of bird communities and the densities of individual species within them are basic types of information needed for bird population studies."--Introd. Text in English and French. gccst Birds gccst Research Canada. Environment Canada. Canadian Wildlife Service. A preliminary catalogue of bird census studies in Canada fre (CaOODSP)9.848942 Progress notes (Canadian Wildlife Service) no. 20 (CaOODSP)9.504439 PDF 2.36 MB https://publications.gc.ca/collections/collection_2017/eccc/CW69-9-20.pdf