Heijbroek, A.M.A.
The world seed market : developments and strategies
Rabobank International Group , 1996
 Buku Teks SO
Heijbroek, A.M.A.
The world seed market : developments and strategies
Rabobank International Group , 1996
 Buku Teks SO
Technology : man remarkes his world
edited by J. Bronowski
Doubleday, 1964
 Buku Teks SO
Rochmah
Laser: rugi-rugi dan dispersi dalam serat optik
Fakultas Teknik Universitas Indonesia, 2000
 UI - Laporan Penelitian
Rochmah
Laser : penerapan teknologi kimunikasi koheren dalam sistem komunikasi serat optik
Fakultas Teknik Universitas Indonesia, 2000
 UI - Laporan Penelitian