Caroll, Brian
The builders: Great Australian construction projects / Brian Carroll
Cassel Australia , 1981
Buku Teks
Seeger, Bernhard
Herbstrauch roman / Bernhard Seeger
Mitteldeutscher,, 1962
Buku Teks
Hendrik en Bernhard
Uitgeverij Lekturama, 1991
Buku Referensi
Peason, Karl
The grammar of science/by Karl Pearson
Meridian Books , 1957
Buku Teks
Pearson, William
Chessplayer / William Pearson
The Viking Press, 1984
Buku Teks