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Analyses of tipple and delivered samples of coal :(collected during the fiscal year 1951)

Analyses of tipple and delivered samples of coal (collected during the fiscal year 1952)

Analyses of tipple and delivered samples of coal :(collected during the fiscal year 1953)

Analyses of tipple and delivered samples of coal :collected during fiscal year 1954

Analyses of tipple and delivered samples of coal :(collected during fiscal year 1956)

Analyses of tipple and delivered samples of coal :(collected during the fiscal year 1957)

Analyses of tipple and delivered samples of coal :(collected during the fiscal year 1958)

Analyses of tipple and delivered samples of coal :collected during fiscal year 1959

Analyses of tipple and delivered samples of coal :(collected during the fiscal year 1960)

Analyses of tipple and delivered samples of coal :collected during fiscal year 1961


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