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File:Erastus L De Forest.jpg

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Català: Retrat del matemàtic nord-americà Erastus Lyman De Forest (1834-1888)
Date before 1888
date QS:P,+1888-00-00T00:00:00Z/7,P1326,+1888-00-00T00:00:00Z/9
Source MacTutor History of Mathematics: http://www-history.mcs.st-andrews.ac.uk/PictDisplay/De_Forest.html
Author no coneguts

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