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1by Zweifel, Ernst### CRL customization ### ?> ### Add publisher and desc details ### ?>
Published 1966Zürich : Schulthess, 1966.xiii, 145 p. ; 23 cm. -
2by Zweifel, Ernst### CRL customization ### ?> ### Add publisher and desc details ### ?>
Published 1977Bern : Stämpfli, 1977.127 p. ; 23 cm. -
3by Zweifel, Ernst, 1909-### CRL customization ### ?> ### Add publisher and desc details ### ?>
Published 1938Berlin : Julius Springer, 1938.p. 569-584 : ill.