Bibtex export
@book{ Engels1907, title = {Die Entwicklung des Sozialismus von der Utopie zur Wissenschaft}, author = {Engels, Friedrich}, year = {1907}, pages = {68}, address = {Berlin}, publisher = {Buchh. Vorwärts}, urn = {https://nbn-resolving.org/urn:nbn:de:0168-ssoar-54711-3}, }