Extensive descriptions of the rise and development of the towage system on the Hoogeland in North Groningen.
The following sources were used, among others:
Fons van Wanroij, 2000 To the ease of the traveling man; With the barge from Groningen to Warffum, Bedum
Hans van Westing, Tim Abelen, Emiel Anker, Fred Boersma, Johan Krist, Dennis Volkerink and Reinder Reinders, 2008 Extension springs in the province of Groningen (thesis)
"Experience the towing history in North Groningen from the water, by bike or on foot!"