Main Report Of The 1959/59 Investigations, On The Ore And Coal Deposits In "Wedexro" Vol. 8, 1960.
In connection with the Agreement concluded with wedexro in March 1956 on the "Investigation into the Geological and Mining Aspects of the Iron-ore and Coal Occurrence in Indonesia" a Supplementary Agreement Was made on July 9, 1958 between the state Planning Bureau in Djakarta-referred to as BPM for short- and Wedexro relating to the investigation of the ore and coal occurrences in Kalimantan.