topic

• Charts, diagrams, etc1
• Cities and towns1
• Growth1
• Sewage disposal in rivers, lakes, etc1
• More Less

name

• A. Hoen & Co1
• District of Columbia. Board of Sanitary Engineers1
• Lee, Alex. Y1
• Pennsylvania Railroad1

collection

• Maps of North America2

place

• Conemaugh Valley1
• Conemaugh Valley (Pa.)1
• Johnstown (Cambria County)1
• Johnstown (Cambria County, Pa.)1
• Pennsylvania1
• More Less

genre

• Maps2
• Aerial views1
• Physical maps1
• Pictorial maps1
• Topographic maps1

publisher

• A.Y. Lee1
• Board of Sanitary Engineers1

division

type

• cartographic2
• still image1