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02a0017783;0-660-15733-0;20011205d1995 ekmy0engy01;eng;a z 000yy;r;Significant Paleozoic petroleum source rocks in the Canadian Williston Basin: their distribution, richness and thermal maturity (southeastern Saskatchewan and southwestern Manitoba);K.G. Osadetz & L.R. Snowdon;Ottawa;Minister of Energy, Mines and Resources Canada;1995;60 p.;ill;Bulletin;Geological Survey of Canada;no.487;2001b;aBulletin ; fGeological Survey of Canada ; vno.487;加拿大威利斯顿盆地萨斯喀彻温东南部与马尼托巴西南部重要的古生代生油源岩--其分布,丰度和热成熟度;a451;Osadetz ; Snowdon;K.G. ; L.R.;101;455193 ; 455758;P;254.1;G29c;v487 ; r90.00;a03;b2;cP