HM-02 1913 Geologic Map of Colorado (George)

HM-01-04 1877 Geologic Map of Colorado (Hayden)

HM-03 1935 Geologic Map of Colorado (Burbank)

HM-04 1913 Topographic Map of Colorado (George)

HM-01A Six 1877 Geologic Map Sheets and Two Cross Sections of Colorado (Hayden)

HM-01-18 1877 Geologic Map, Sheet XVIII: Geologic Cross Sections of the Western Slope and Central CO (Hayden)

HM-01-14 1877 Geologic Map, Sheet XIV: Western CO and Part of UT (Hayden)

HM-01-11 1877 Geologic Map, Sheet XI: NW CO and Part of UT (Hayden)

HM-01-17 1877 Geologic Map, Sheet XVII: Geologic Cross Sections of the Front Range and Central CO (Hayden)

HM-01-13 1877 Geologic Map, Sheet XIII: Central CO (Hayden)

HM-01-12 1877 Geologic Map, Sheet XII: North Central CO (Hayden)

HM-01-16 1877 Geologic Map, Sheet XVI: South-Central CO and Part of NM (Hayden)