De Blij, Harm J., author
John Wiley & Sons, 1981
Buku Teks
De Blij, Harm J., author
John Wiley & Sons, 1994
Buku Teks
De Blij, Harm J., author
John Wiley & Sons, 1997
Buku Teks
De Blij, Harm J., author
John Wiley & Sons, 1981
Buku Teks
Holt-Jensen, Arild, author
Publications, 2003
Buku Teks