" "Journal of Southern History" (1941) 7#2 pp: 145-159. in JSTOR* Robbins, Roy M., "Horace Greeley: Land Reform and Unemployment, 1837-1862," "Agricultural History", VII, 18 (January, 1933).
online edition* Robbins, Roy M., «Horace Greeley: Land Reform and Unemployment, 1837—1862,» "Agricultural History", VII, 18 (January, 1933).