Crescograph was invented by (1) S.N. Bose (2) P.C. Roy (3) J.C. Bose (4) P.C. Mahalanobis

Crescograph was invented by (1) S.N. Bose (2) P.C. Roy (3) J.C. Bose (4) P.C. Mahalanobis
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J.C. Bose
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