De Blij, Harm J., author
John Wiley & Sons, 2005
Buku Teks
De Blij, Harm J., author
John Wiley & Sons, 1971
Buku Teks
De Blij, Harm J., author
John Wiley & Sons, 1981
Buku Teks
Davis, George H., author
Wiley, 2012
Buku Teks
De Blij, Harm J., author
John Wiley & Sons, 1994
Buku Teks