Dela Cruz, H. (1946). Computation of geographic positions of location monuments connected by traverse to triangulation stations.
Lua i Stíl Chicago (17ú heag.)Dela Cruz, Hugo. Computation of Geographic Positions of Location Monuments Connected by Traverse to Triangulation Stations. 1946.
Lua MLA (9ú heag.)Dela Cruz, Hugo. Computation of Geographic Positions of Location Monuments Connected by Traverse to Triangulation Stations. 1946.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.