The boundary of the Glen Canyon and San Rafael groups (Triassic and Jurassic) in southern Utah and northern Arizona [abs.]

Peterson, Fred, and Pipiringos, G.N., 1979, The boundary of the Glen Canyon and San Rafael groups (Triassic and Jurassic) in southern Utah and northern Arizona [abs.]: Geological Society of America Abstracts with Programs, v. 11, no. 7, p. 494.