GREAT CONSISE STAMP CATALOGU/ MICHEL DEUTSCHLAND KATALOG/ SPECIALE CATALOGUS POSTZELGS VAN NEDERLAND../ NETTO MARKTPREIS KATALOG/ ZUMSTEIN SCHWEIZ LICHTENSTEIN 6 volsa
Londen 2000/ Munchen 2004-2005/ Munchen 1991/ 2003/1995-96/ Bern 1997, text and ill. m40