Não informado. (1934). Industrial Heating. Business News Publishing.
Lua i Stíl Chicago (17ú heag.)Não informado. Industrial Heating. Pittsburgh, Pa: Business News Publishing, 1934.
Lua MLA (8ú heag.)Não informado. Industrial Heating. Business News Publishing, 1934.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.