McLemore, V.T., 2000, Supplemental road log 2, from Lordsburg to Duncan, Arizona, and Steeple Rock District, New Mexico and Arizona, with a section on Milling and smelting at the Steeple Rock Mining District, by I.H. Gundiler, in Lawton, T.F., McMillan, N.J., and McLemore, V.T., eds., Southwest Passage - A trip through the Phanerozoic: New Mexico Geological Society 51st Field Conference Guidebook, p. 51-70.