Townsend, R. (1879). On a general property in the theory of attractions.
Lua i Stíl Chicago (17ú heag.)Townsend, Richard. On a General Property in the Theory of Attractions. 1879.
Lua MLA (9ú heag.)Townsend, Richard. On a General Property in the Theory of Attractions. 1879.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
