Threlfall, Harold  <br/><br/>
A text-book on surveying and levelling /  
Harold Threlfall  
 - 3rd ed., revised. 
 - London :  Charles Griffin and Company,   1948 
 - xix, 689 p. :  ill. ;  21 cm. 
<br/><br/> Includes Indexes 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Surveying
<br/><br/><label>Dewey Class. No.: </label>526.9  / THT 1948