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1.- Copper belts, lead belts and copperlead lines of the world Laznicka, Peter; Congreso - International Geological Congress (24. 1972. Montreal); Congreso - International Geological Congress (24. 1972. Montreal); Wilson, H.D.B. 1972 Monografías Ver registro
2.- The significance of a copper - lead line in metallogenye Wilson, H.D.B.; Congreso - International Geological Congress (24. 1972. Montreal); Laznicka, Peter 1972 Monografías Ver registro
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