The impacts of problems in managing and promoting cave destinations in assessing the state of spelunking in the Philippines a case study of Biak-Na-Bato National Park in Bulacan

ग्रंथसूची विवरण
मुख्य लेखक: Cansino, Abegale B.
स्वरूप: थीसिस
भाषा:English
प्रकाशित: 2004
विषय: