TY - BOOK AU - Cruz, Reil G. TI - Sustainable tourism/ SN - 978-621-04-0102-8 U1 - Fil. 338.4791 C955s 2019 First edition PY - 2019/// CY - Mania, Philippines PB - Rex Bookstore KW - 1. Ecotourism N1 - Includes index ER -