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Bureau of Mines / Minerals yearbook mineral industries of Latin America and Canada 1992
(1992)
Velasco, Pablo
Ecuador, pp. [226]-243
Page [226]
![[page image]](http://images.library.wisc.edu/EcoNatRes/0002/0007/M/0236.gif)
As a work of the United States government, this material is in the public domain.| For information on re-use see: http://digital.library.wisc.edu/1711.dl/Copyright




