TY  - BOOK
AU  - Yan,Haowen
AU  - Yang,Weifang
TI  - Surveying: principles and methods 
SN  - 1842657208
AV  - TA545 Y35
PY  - 2012///
CY  - Beijing, China, Oxford, United Kingdom
PB  - Science Press, Alpha Science International
KW  - Topografía
KW  - Libros de texto
ER  -