National Academies of Sciences, Engineering, and Medicine; Division on Earth and Life Studies; Polar Research Board; Committee o National Academies Press (2015) Pehmeäkantinen kirja
O. Bauer; O. Vollenbruck; G. Schikorr; E. Schmid; W. Boas; P. Beck; M. Polanyi; G. Wassermann; W. Fahrenhorst; Siebel Springer-Verlag Berlin and Heidelberg GmbH & Co. KG (1932) Pehmeäkantinen kirja
National Academies of Sciences, Engineering, and Medicine; Division on Earth and Life Studies; Polar Research Board; Committee o National Academies Press (2022) Pehmeäkantinen kirja