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1by Grimshaw, H. C.### CRL customization ### ?> ### Add publisher and desc details ### ?>
Published 1956Sheffield : Ministry of Fuel and Power, Safety in Mines Research Establishment, 1956.16 p. ; 24 cm. -
2by Shaw, S. K.### CRL customization ### ?> ### Add publisher and desc details ### ?>
Published 1956Sheffield : Ministry of Fuel and Power, Safety in Mines Research Establishment, 1956.21 p. : ill. ; 24 cm.