edited by David F. Walker
John Wiley & Sons, 1980
Buku Teks
Bryce, Murray D., author
McGraw-Hill, 1965
Buku Teks
Bryce, Murray D., author
McGraw-Hill, 1960
Buku Teks
Tinbergen, Jan, 1903-, author
McGraw-Hill, 1967
Buku Teks
PWN-Polish Scientiic Publishers, 1968
Buku Teks