Não informado. (1950). Industrial mathematics. Industrial Mathematics Society.
Lua i Stíl Chicago (17ú heag.)Não informado. Industrial Mathematics. Detroit, Mich: Industrial Mathematics Society, 1950.
Lua MLA (8ú heag.)Não informado. Industrial Mathematics. Industrial Mathematics Society, 1950.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.