Rippelmeyer. The Civilian Conservation Corps in Southern Illinois, 1933-1942. Southern Illinois University Press.
Lua i Stíl Chicago (17ú heag.)Rippelmeyer. The Civilian Conservation Corps in Southern Illinois, 1933-1942. Southern Illinois University Press.
Lua MLA (8ú heag.)Rippelmeyer. The Civilian Conservation Corps in Southern Illinois, 1933-1942. Southern Illinois University Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.