Thanks

We thank Wessel Haagh and Harry Wildeboer for all the ‘digital work’, Ben Brunet de Rochebrune and Karien Plant for the many pictures. We are very grateful to Kelly Thayer (U.S.) and Rudy Kuehnle (Canada) for checking our first texts and… their endless patience. Last but not least we are thankful to Eduard Rijnja for his timeless loyalty.