Não informado. Publications on Geodesy. Netherlands Geodetic Commission.
Lua i Stíl Chicago (17ú heag.)Não informado. Publications on Geodesy. Delft, Holanda: Netherlands Geodetic Commission.
Lua MLA (8ú heag.)Não informado. Publications on Geodesy. Netherlands Geodetic Commission.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.