PPDO geographical coding scheme.

ग्रंथसूची विवरण
निगमित लेखक:	Philippines. Department of Public Works, Transportation and Communications. Planning and Project Development Office
स्वरूप:	पुस्तक
भाषा:	English
प्रकाशित:	Manila [s.n. n.d.]
विषय:	Geographical location codes.