| References: |
- Deposit:: ENG. MINING JOUR., MINING JOUR. INTERNATIONAL DIRECTORY, 197
- Deposit:: 259.
- Deposit:: APEX MINING CO., INC. 1979 ANNUAL REPORT
- Deposit:: ENG. & MINING JOURNAL. JAN 1980. P.81.
- Deposit:: WALTHER, H.W., NAST, K. AND FORSTER, H. DEPOSITS AND MINING
- Deposit:: IN THE PHILIPPINES. SPECIAL REPORT FROM THE FEDERAL
- Deposit:: INSTITUTION FOR GEOSCIENCE AND NATL. RESOURCES, 1976.
- Reserve-Resource:: THE PHILIPPINES-PROSPECTUS FOR THE MINING INDUSTRY.
- Reserve-Resource:: SOUTH-EAST ASIA MINING LETTER, 10/14/94, P.3,4.
|