Não informado. (1969). Comments on astrophysics and space physics. Gordon and Breach.
Lua i Stíl Chicago (17ú heag.)Não informado. Comments on Astrophysics and Space Physics. New York: Gordon and Breach, 1969.
Lua MLA (8ú heag.)Não informado. Comments on Astrophysics and Space Physics. Gordon and Breach, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.