00000nas 2200000za 4500 9.845900 CaOODSP 20241203113640 cr ||||||||||| 171023d20072012onc x m o f0###a0eng|d CaOODSP eng eng fre n-cn--- En83-9E-PDF WSTD contribution [electronic resource] / Environment Canada, Water Science and Technology Directorate. Burlington, Ont. : Environment Canada, [2007-2012]. v. : ill. Irregular Began in 2007 ; ceased in 2012. Digitized editions from print [produced by Environment and Climate Change Canada]. Description based on: no. 07-002. Includes abstract in French. gccst Water quality Canada. Environment Canada. Canada. Water Science and Technology Directorate.