[1]
Gissel, S. 1970. Tools and Tillage. A Journal on the History of the Implements of Cultivation and other Agricultural Processes. Edited by Axel Steensberg, Alexander Fenton and Grith Lerche. Copenhagen, G. E. C. Gad. Vol. 1:1.1968. 64 ss. Hl. Subskription 3 $. Historisk Tidsskrift. 12, (jan. 1970).