00282nam a2200109Ia 450000500170000000800410001708200140005810000180007224500280009026000460011830000080016420260224041019.0260224s9999||||xx |||||||||||||| ||und||  a526.9 SHA  aShahani P. B. 0aText book of surveying   aNew Delhi: Oxford &IBH. Publishers c1979  a516