Main contributions to the maps :

BDFMG (2011)

Other dataset received and included at 01.III.2011 : Denmark (Kobenhavn, UTM map, 1974); Finland (E. Valkeila in litt.; received 1974).

Main collections studied (AP) : Belgium (Brussels, Gembloux, Mons); France (Paris, Strasbourg, INRA Avignon); Germany (Berlin, Munchen); Norway (Bergen); The Netherlands (Amsterdam, Leiden); Sweden (Lund, Stockholm); United Kingdom (London).

Main private collections studied: ...

Litterature: Ebmer (various papers).