APA (7th ed.) Citation

Geological Survey (U.S.). Gloucester, Mass.--N. H.--Maine: 1:100 000-scale metric topographic map.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Gloucester, Mass.--N. H.--Maine: 1:100 000-scale Metric Topographic Map.

MLA (9th ed.) Citation

Geological Survey (U.S.). Gloucester, Mass.--N. H.--Maine: 1:100 000-scale Metric Topographic Map.

Warning: These citations may not always be 100% accurate.