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Spangenburg Ray. (2000). On the shoulders of giants: The history of science from 1946 to the 1990's (rep. ed.). Calcutta: University Press.

Spangenburg Ray. On the Shoulders of Giants: The History of Science From 1946 to the 1990's. rep. ed. Calcutta: University Press, 2000.

Spangenburg Ray. On the Shoulders of Giants: The History of Science From 1946 to the 1990's. rep. ed. Calcutta: University Press, 2000.