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Engel Friedrich : Theory of transformation groups I : General properties of continuous transformation groups ; a contemporary approach and translation / Sophus Lie ; with the collaboration of Friedrich Engel ; editor and translator, Joel Merker.
Engel Lloyd W : Proceedings of the 16th Conference on High Magnetic Fields in Semiconductor Physics (SemiMag16) : Tallahassee, Florida, USA, August 2-6, 2004 / editors, Yong-Jie Wang, Lloyd Engel and Nicholas Bonesteel.
Engel Michael S : Evolution of the insects / David Grimaldi, Michael S. Engel.
Engel Monroe : Uses of literature. / Edited by Monroe Engel.
Engel Norman : Works. Selections http://id.loc.gov/authorities/names/n82012376
Engel Pal 1938 2001 : The Arpads and the Comneni : political relations between Hungary and Byzantium in the 12th century / Ferenc Makk ; [translated by Gyorgy Novak ; translation revised by Maurice F. Cassidy and Istvan Petrovics ; Hungarian text revised by Pal Engel].