Sawlan M.G. Mineral resources of the South Warner Contiguous Wilderness Study area, Modoc County, California / M. G. Sawlan, J. G. Frisken, M. S. Miller, 1989. - VI,21 p. p. - Текст : непосредственный.
Mineral resources of the Malheur River-Bluebucket Creek Wilderness Study Area,Harney County,Oregon / M.G.Sawlan,R.L.Turner,R.C.Jachens и др., 1995. - 16 p. - Текст : непосредственный.
Sawlan M.G. Mineral resources of the Spaulding Wilderness study area,Lake and Harney Counties,Origon / M.G.Sawlan,H.D.King,D.Plouff, 1995. - 18 p. - Текст : непосредственный.