Ben Oostdam's
Autobiography:

page 5

1960
WHOI

"CHAIN 13"

Chlorophyll

Map of Baltic Marine Environment - Helsinki Commission - Note about "Environment"

NOVA Online: The Vikings
Vikings in the New World
European Trade in the XVth Century showing Hanse towns
The Hanseatic League

kogge

BLO fecit 20020823 - next page - Contents