Annual report.

Sonraí bibleagrafaíochta
Údair chorparáideacha:	Philippines (Commonwealth) Bureau of Science, Philippines (Commonwealth). Bureau of Mines
Formáid:	LEABHAR
Teanga:	English
Foilsithe / Cruthaithe:	Manila Bureau of Printing 1937-
Ábhair:	Mines and mineral resources > Philippines.