by Marx, Karl, 1818-1883, Engels, Friedrich, 1820-1895
Year of Publication 1974

by Engel, Ulrich, 1928-
Year of Publication 2009

by Engel, Lothar, 1942-
Year of Publication 1978

by Engel, Rafael J., Schutt, Russell K., 1951-
Year of Publication 2013

by Engels, Friedrich, 1820-1895
Year of Publication 1950

by Engel, Rafael J., Schutt, Russell K., 1951-
Year of Publication 2017

by Engels, Siegfried, Nowak, Alois
Year of Publication 1977

Year of Publication 2014

Year of Publication 2015

by Engel, Lothar, 1942-
Year of Publication 1981

by Pavia, Donald L., Lampman, Gary M., 1937-, Kriz, George S., Engel, Randall G.
Year of Publication 2016

by Engel, Siegbert, 1959-
Year of Publication 2009