National Geographic : 1944 Nov
An Estimated 30 Million Tons of High-grade Iron Ore Surround a Harbor Created byNature asifforItsExport Before the war, Japanese took extensive samples from Dahikan Bay area. Nickel, too, exists here. Chromite is associated with much Mindanao iron (page 563). George Kemmer A Tugunan River Gold Bed Slowly Panned since Ancient Times Is Swiftly Washed Away by American Hydraulic Equipment As water piped from a higher level bites into the hill, gravel flows into a flume, where it is washedfor nuggets and dust (page 561).