Bulletins. 1041-C, D, E. Coalfields of Republic of Korea: pt 2, Geology of Macha-ri coalfield [with list of literature cited], by John A. Reinemund: Geology of Hamback coalfield [with list of literature cited], by Edwart M. Baldwin; Geology of Tangyang coalfield [with list of literature cited), by Kenneth G. Brill, jr.