00000nam 2200000zi 4500 9.874104 CaOODSP 20241203113649 m o d f cr |n||||||||| 190531s2000 oncadb |o f001 0 eng d CaOODSP eng rda CaOODSP n-cn--- En37-90/2000E-PDF En37-90/2000E A primer on fresh water : questions and answers. 5th edition. [Ottawa] : Environment Canada = Environnement Canada, [2000] ©2000 1 online resource (80 pages) : illustrations, charts, maps text txt rdacontent computer c rdamedia online resource cr rdacarrier Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "In 1986, the World Commission on Environment and Development called on the nations of the world to practice sustainable development: to meet the needs of present generations without compromising the ability of future generations to meet their own needs"--Introd. Issued also in print format. gccst Water gccst Water quality gccst Water conservation Canada. Environment Canada. Notions élémentaires sur l'eau douce : (CaOODSP)9.915291 A primer on fresh water : (CaOODSP)9.647682 PDF 63.59 MB https://publications.gc.ca/collections/collection_2019/eccc/En37-90-2000-eng.pdf