(1972). Index to volume 23, 1972; Analytical abstracts. 1972.
Lua i Stíl Chicago (17ú heag.)Index to Volume 23, 1972; Analytical Abstracts. 1972, 1972.
Lua MLA (9ú heag.)Index to Volume 23, 1972; Analytical Abstracts. 1972, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.