na INLIS000000000013266 Ind 0010-1118013266 Physiography and pyrite formation in Berbak, Sumatra, Indonesia DIEMONT, W.H. W.H. Diemont; H. van Reuler Arnhem Research Institute for Nature Management 1984 34 p. : ill. ; 29 cm. 34 p. : ill. ; 29 cm. 551.4(921)DIEp 551.4(921) PYRITE PHYSIOGRAPHY GEOMORPHOLOGY SUMATRA 311/D/2002