ALLAN, A.L / HOLLWEY, J.R / MAYNES, J.H.B. <br/><br/>
PRACTICAL FIELD SURVEYING AND COMPUTATIONS 
A.L. ALLAN/ J.R. HOLLWEY/ J.H.B. MAYNES 
 - LONDON  NEINEMANN  1968 
 - xvi, 689p.,ill.;  HBK