1) Zandee, Dick. 1985. Tailing disposal at Marcopper Mining Corporation. In Asia Mining '85, The In

1) Zandee, Dick. 1985. Tailing disposal at Marcopper Mining Corporation. In Asia Mining '85, The Institution of Mining and Metallurgy, pp. 35-45.; Philippine Mining Journal, October 1969:38.
2) Philippine Mining Journal, October 1969:38.
3) Zandee, Dick. 1985. Tailing disposal at Marcopper Mining Corporation. In Asia Mining '85, The Institution of Mining and Metallurgy, pp. 35-45
4) USGS report: http://geology.cr.usgs.gov/pub/open-file-reports/ofr-01-0441
5) Globe and Mail: April 16, 1998; Cooney, James. February 2001. Letter to Fabien Leboeuf, Canadian Catholic Organization for Development and Peace.
6) Reid, S. June 29, 1994. Letter to Mayor Ruben Tan of Mogpog.
7) USGS report: http://geology.cr.usgs.gov/pub/open-file-reports/ofr-00-0397
8) UNEP, September 1996. Final Report of the United Nations Expert Assessment Mission to Marinduque Island, Philippines. P. 68.
9) UNEP, September 1996. Final Report of the United Nations Expert Assessment Mission to Marinduque Island, Philippines. P. 69.
10) Mines and Geosciences Bureau, 2001.
11) USGS report: http://geology.cr.usgs.gov/pub/open-file-reports/ofr-00-0397
12) Resolution No. 2002-05, February 2, 2002. A RESOLUTION URGING MARCOPPER/PLACER DOME TO IMMEDIATELY CONTINUE THE PAYMENTS OF DAMAGE CLAIMS FOR THE REMAINING BARANGAYS AFFECTED BY THE 1996 MINE SPILL.
13) Ramos, V. Secretary, Department of Environment and Natural Resources (DENR), 1997; Cerilles, A. Secretary, DENR 1999.
14) Alvarez, H. Secretary Department of the Environment and Natural Resources, October 11, 2001. Directive to Jay Taylor, CEO Placer Dome, and others.
15) Placer Dome, 1998. Sustainability Policy.