problems and prospects Lamson, Cynthia VanderZwaag, David L. Cambridge, England : Cambridge University Press 1988, copyr 1986 1988 1986 eng 316 p. / editors, Cynthia Lamson, David L. VanderZwaag r------n-cn--- Shipping Arctic regions Navigation Arctic regions Canada, Northern Economic conditions Northwest Passage HE935 0521320658 85017100 UIAM 850711 20230419163905.0 6289 eng