The legend among students was that La Putt’s Elementary Surveying existed in two forms: the official reprinted textbook sold at the co-op for ₱850, and the “ghost PDF”—a rumored scanned copy from 1987 that contained solved problems in someone’s illegible margin notes, including a mysterious correction to a traverse computation that had saved an entire batch from failing the board exam.
Differential, profile, and reciprocal leveling; topographic and plane table surveys. Specialized Surveys: elementary surveying by la putt pdf