APA

Winkler G. R., . (1992). The Alaska mineral resource assessment program: Background information to accompany geologic and mineral-resource maps of the Cordova and Middleton island quadrangles, southern Alaska. Washington, DC: U.S. Gov. Print. Off.

Chicago

Winkler Gary R, . 1992. The Alaska mineral resource assessment program: Background information to accompany geologic and mineral-resource maps of the Cordova and Middleton island quadrangles, southern Alaska. Washington, DC: U.S. Gov. Print. Off.

Harvard

Winkler G. R., . (1992). The Alaska mineral resource assessment program: Background information to accompany geologic and mineral-resource maps of the Cordova and Middleton island quadrangles, southern Alaska. Washington, DC: U.S. Gov. Print. Off.

MLA

Winkler Gary R, . The Alaska mineral resource assessment program: Background information to accompany geologic and mineral-resource maps of the Cordova and Middleton island quadrangles, southern Alaska. Washington, DC: U.S. Gov. Print. Off. 1992.