Maps.com (Firm) & ebrary, Inc. (2000). Expansion of railroads to 1860. Maps.com.
Lua i Stíl Chicago (17ú heag.)Maps.com (Firm) agus Inc ebrary. Expansion of Railroads to 1860. [S.l.]: Maps.com, 2000.
Lua MLA (9ú heag.)Maps.com (Firm) agus Inc ebrary. Expansion of Railroads to 1860. Maps.com, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.