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1by Hoff, C. von### CRL customization ### ?> ### Add publisher and desc details ### ?>
Published 1956Sheffield : Published by the Safety in Mines Research Establishment, Ministry of Power, [1956?]11, [8] p. : ill. ; 25 cm. -
2by Hoff, C. von### CRL customization ### ?> ### Add publisher and desc details ### ?>
Published 1954[Sheffield] : Safety in Mines Research Establishment, 1954.18 p. : ill.