Allan, Arthur Laidlaw, <br/><br/>
Practical surveying and computations / 
A. L. Allan. 
 - 2nd ed. 
 - Oxford :  Butterworth-Heinemann,  1993. 
 - 573 pages :  illustration ;  24 cm. 
<br/><br/> Rev. ed. of : Practical field surveying of computations, 1968 
<br/><br/>p.567-568 
<br/><br/><label>ISBN: </label>0750603933 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Surveying