Comment on 'Mesozoic ash-flow caldera fragments in southeastern Arizona and their relation to porphyry copper deposits' by P.W. Lipman and D.A. Sawyer
Erickson, R.C., 1986, Comment on 'Mesozoic ash-flow caldera fragments in southeastern Arizona and their relation to porphyry copper deposits' by P.W. Lipman and D.A. Sawyer: Geology, v. 14, no. 6, p. 539-540.
