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1Published 1956### CRL customization ### ?> ### Add publisher and desc details ### ?>Syktyvkar : Komi knizhnoe izd-vo, 1956.97 p., [3] leaves of folded plates : ill. ; 23 cm.Subjects: “...Coal mines and mining Labor productivity Russia (Federation) Pechora Basin....”
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2Published 1978### CRL customization ### ?> ### Add publisher and desc details ### ?>Vilʹn︠i︡us : M-vo vyssh. i sred. spe︠t︡s. obrazovani︠i︡a LitSSR, 1978.404 p. ; 21 cm.Subjects: “...Labor productivity Congresses....”