41. Some experts called the problems of the coal fields typical of what ails German industry. 42. The coal field extended northwards under the Irish Sea. 43. Western Kentucky coal field production has risen since 2004. 44. In 1874 an R . M . Waterman owned large coal fields north of town. 45. In 1950 there was development of the Ombilin coal field with Padang as its outlet. 46. The long decline of the Eastern coal fields also led many miners to leave the industry. 47. The agreement also provides for developing technologies to produce methane at coal fields in central Siberia. 48. Section Six served the coal fields between Cloverdale. 49. There are also bituminous coal fields near K�nadsa. 50. Its most-promising holdings are concessions to extract methane, a type of natural gas, from Polish coal fields .
