Lincolnshire Naturalists' Union. Transactions. Keyworth and Fry.
Lua i Stíl Chicago (17ú heag.)Lincolnshire Naturalists' Union. Transactions. Lincoln: Keyworth and Fry.
Lua MLA (8ú heag.)Lincolnshire Naturalists' Union. Transactions. Keyworth and Fry.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.