00599cam a2200181 4500 100365292 TxAuBib 20070420120000.0 120303s2012||||||||||||||||||||||||eng|u 39041 Project Gutenberg PGUSA eng TxAuBib De Morgan, Augustus. Elementary Illustrations of the Differential and Integral Calculus [Gutenberg] / by Augustus, 1806-1871 De Morgan. Project Gutenberg, 2012. Project Gutenberg. Freely available. Electronic text. http://www.gutenberg.org/license Rights