Riddleberger، Patrick W. (أبريل 1959). "The Break in the Radical Ranks: Liberals vs Stalwarts in the Election of 1872". The Journal of Negro History. ج. 44 ع. 2: 136–57. DOI:10.2307/2716035. JSTOR:2716035. S2CID:149957268.
Stanley Coben (يونيو 1959). "Northeastern Business and Radical Reconstruction: A Re-examination". Mississippi Valley Historical Review. ج. 46 ع. 1: 67–90. DOI:10.2307/1892388. JSTOR:1892388.
Riddleberger، Patrick W. (أبريل 1959). "The Break in the Radical Ranks: Liberals vs Stalwarts in the Election of 1872". The Journal of Negro History. ج. 44 ع. 2: 136–57. DOI:10.2307/2716035. JSTOR:2716035. S2CID:149957268.
Stanley Coben (يونيو 1959). "Northeastern Business and Radical Reconstruction: A Re-examination". Mississippi Valley Historical Review. ج. 46 ع. 1: 67–90. DOI:10.2307/1892388. JSTOR:1892388.
Riddleberger، Patrick W. (أبريل 1959). "The Break in the Radical Ranks: Liberals vs Stalwarts in the Election of 1872". The Journal of Negro History. ج. 44 ع. 2: 136–57. DOI:10.2307/2716035. JSTOR:2716035. S2CID:149957268.