L'Ecuyer, R. E. (1993). Ruby-Poorman mining district, Ruby quadrangle, Alaska. Bureau of Land Management, Alaska State Office.
Chicago Style (17th ed.) CitationL'Ecuyer, Rosalie E. Ruby-Poorman Mining District, Ruby Quadrangle, Alaska. Anchorage, Alaska: Bureau of Land Management, Alaska State Office, 1993.
MLA (9th ed.) CitationL'Ecuyer, Rosalie E. Ruby-Poorman Mining District, Ruby Quadrangle, Alaska. Bureau of Land Management, Alaska State Office, 1993.
Warning: These citations may not always be 100% accurate.