reprint ice drift measurement in Western Parry channel / by R.I. Verrall, J.H. Ganton & A.R. Milne Canada in Flanders / by Max Aitken ; with a pref. by the Rt.Hon.A.Bonar Law ; and an introd. by the Rt.Hon.Sir Robert Borden Prins Bernhard Prinses Juliana Prinses Juliana en prins Bernhard Prinses Juliana en prins Bernhard met hun drie dochters en prinsesjes Beatrix, Irene en Margriet