Detailed coal exploration in Napal, Peranap, Riau, Sumatera, Indonesia

Indonesian Mining Journal

The Coal industry

Studi kasus kebijakan pertambangan mineral dan batuan Indonesia : analisis pemikiran resource nationalism (periode 2009-2014) = Case study of Indonesian mineral and ores mining policies : the analysis of resource nationalism (period of 2009-2014)

Coal: Japan's policy and its relation to Indonesian needs