Peter O. Hales

Rb-Sr and K-Ar geochronometry of Mesozoic granitic rocks and their Sr isotopic composition, Oregon, Washington, and Idaho

R. Armstrong, W. H. Taubeneck, Peter O. Hales, 1977 .

Geology of the Green Ridge area, Whitewater River Quadrangle, Oregon

Peter O. Hales, 1974 .