La Putt, Juny Pilapil. Elementary surveying / Juny Pilapil La Putt. - 3rd ed. - Baguio City, Philippines : Baguio Research and Publishing Centre, 2008. - ix, 643 pages : illustrations ; 22 cm. Includes index. Bibliography : p. 637-638. ISBN: 971 0855816 Subjects--Topical Terms: Surveying Dewey Class. No.: 526.9 / P993