APA

Gamble E. E., . (1990). A Reevaluation of the "Illinoian till plain" and the origin of the gritty loess substratumof Avonburg and Clermont soils in southeastern Indiana. Washington: Soil Conservation Service.

Chicago

Gamble E E, . 1990. A Reevaluation of the "Illinoian till plain" and the origin of the gritty loess substratumof Avonburg and Clermont soils in southeastern Indiana. Washington: Soil Conservation Service.

Harvard

Gamble E. E., . (1990). A Reevaluation of the "Illinoian till plain" and the origin of the gritty loess substratumof Avonburg and Clermont soils in southeastern Indiana. Washington: Soil Conservation Service.

MLA

Gamble E E, . A Reevaluation of the "Illinoian till plain" and the origin of the gritty loess substratumof Avonburg and Clermont soils in southeastern Indiana. Washington: Soil Conservation Service. 1990.