La Putt, Juny Pilapil. <br/><br/>
Elementary surveying :  instructional manual. 

 - rev. ed. 
 - Maniila, Philippines :  National Book Store,  1981. 
 - 399p. :  illus. ;  17cm. 
<br/><br/><label>LC Class. No.: </label>FIL TA 545  / L36