Mnemosyne, 1900, Vol. 28: Bibliotheca Philologica Batava (Classic Reprint) Leeuwen, Jan van Heftet / 2018 / Latin
Mnemosyne, 1900, Vol. 28: Bibliotheca Philologica Batava (Classic Reprint) Leeuwen, Jan van Innbundet / 2018 / Latin
Epistola Critica Ad Amicos J. Van Leeuwen Et M. B. Mendes da Costa: Continens Annotationes Ad Odysseam (Classic Reprint) Leeuwen, Jan van Heftet / 2022 / Latin
Algorithms - ESA '94 Second Annual European Symposium, Utrecht, The Netherlands, September 26 - 28, 1994. Proceedings Leeuwen, Jan van Heftet / 1994 / Engelsk
Graph-Theoretic Concepts in Computer Science International Workshop WG `88 Amsterdam, The Netherlands, June 15-17, 1988. Proceedings Leeuwen, Jan van Heftet / 1989 / Engelsk
Graph-Theoretic Concepts in Computer Science 19th International Workshop, WG '93, Utrecht, The Netherlands, June 16 - 18, 1993. Proceedings Leeuwen, Jan van Heftet / 1994 / Engelsk
Distributed Algorithms 2nd International Workshop, Amsterdam, The Netherlands, July 8-10, 1987. Proceedings Leeuwen, Jan van Heftet / 1988 / Engelsk
Distributed Algorithms 4th International Workshop, Bari, Italy, September 24-26, 1990. Proceedings. Leeuwen, Jan van Heftet / 1991 / Engelsk
