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Analyses of tipple and delivered samples of coal :collected during the fiscal year 1962
Analyses of tipple and delivered samples of coal :collected during the fiscal year 1963
Analyses of tipple and delivered samples of coal collected during fiscal year 1964
Analyses of tipple and delivered samples of coal :collected during the fiscal year 1965
Analyses of tipple and delivered samples of coal :collected during fiscal year 1967
Analyses of tipple and delivered samples of coalcollected during fiscal year 1973
Analyses of tipple and delivered samples of coal :collected during fiscal year 1972
Analyses of tipple and delivered samples of coal:collected during fiscal year 1974
Analyses of tipple and delivered samples of coalcollected during fiscal year 1975