Fagerholm, P. O. (1952). A study of mechanical radial triangulation and some related problems in modern mapping.
Lua i Stíl Chicago (17ú heag.)Fagerholm, Per Olof. A Study of Mechanical Radial Triangulation and Some Related Problems in Modern Mapping. Stockholm, 1952.
Lua MLA (8ú heag.)Fagerholm, Per Olof. A Study of Mechanical Radial Triangulation and Some Related Problems in Modern Mapping. 1952.
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