Dhaka University Library Online catalog

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Hartrek, Douglas Rayner.

Calculating instruments and machines / Douglas R. Hartree. - Camb. : Univ. Press, 1950. - xi, 138 p. : ill. ; 24 cm.

Includes bibliographical references and index.

Subjects--Topical Terms:
Calculators.
Mathematical instruments.

Dewey Class. No.: 681.14 / HAC

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