Autor
Organización Mundial del Turismo (OMT)
6
Burbidge, A.A
1
Chen, Bingwei
1
Deyo, Frederic C.
1
Fallows, James
1
Huang, Jiqing, 1904-
1
International Telecommunication Union
1
Langman, R.C
1
National Geographic Society. Cartographic Division
1
Smith, Peter L.
1
Staple, Gregory
1
Swatridge, L.A
1
Telecommunication Development Bureau
1
Ure, John
1