Dasar-dasar ekologi
1993
 Buku Teks
Odum, Eugene Pleasants
Dasar-dasar ekologi
Gadjah Mada University Press, 1996
 Buku Teks SO
Ekologi = Ecology
Yayasan Obor Indonesia, 1988
 Buku Teks SO
Seyhan, Ersin
Dasar-dasar hidrologi = Fundamentals of hydrology
Gadjah Mada University Press , 1990
 Buku Teks SO
Seyhan, Ersin
Dasar-dasar hidrologi = Fundamentals of hydrology
Gadjah Mada University Press , 1995
 Buku Teks SO