- 5980
- 1989-01-04
technology: بحث علمي
- 5646
- 1988-01-31
- 5224
- 1986-11-27
- 5012
- 1986-04-24
- 4938
- 1986-02-09
- 4760
- 1985-08-12
- 4757
- 1985-08-09
- 4752
- 1985-08-04
- 4751
- 1985-08-03
- 4377
- 1984-07-21
- 4123
- 1983-11-05
- 4108
- 1983-10-21
- 4103
- 1983-10-16
- 4088
- 1983-09-30
- 3720
- 1982-09-20
- 3711
- 1982-09-11