name

• Chapman, R. H. (Robert Hollister), 1868-19201
• Geological Survey (U.S.)1
• Lloyd, W. J. (Topographer)1
• Thompson, Gilbert, 1839-19091

collection

• Maps of North America1

place

• Helena (Mont.)1
• Helena Region (Mont.)1

genre

• Maps1
• Topographic maps1

publisher

division

• Map Division1

type

• cartographic1