Niederlande/Netherlands: 
Datema-Delfzijl, b. v. 
Oude Schans 11, Postbus 1 01, NL-9930 AD Delizijl, 
Tel.: (00 31 59 60) 1 38 10, Telex 53 255 
nur Seekarten/for charts only: 
Observator b. v. 
Vasteland 18-26, NL-3011 BL Rotterdam, 
Tel.: (0 10) 13 00 60, Telex 26 545-obmar ne 
Danemark/Denmark: 
Iver C. Weilbach & Co A/S. 
Toldbodgade 35, P. O. Box 20 51, DK-1253 Kobenhavn K, 
Tel.: (0 04 51) 13 59 2?, Telex 19 709