- 3167
- 1981-03-08
technology: تحلية المياه
- 2995
- 1980-09-15
- 2915
- 1980-06-26
- 2833
- 1980-04-05
- 2806
- 1980-03-09
- 2676
- 1979-10-27
- 2616
- 1979-08-28
- 2396
- 1979-01-19
- 2335
- 1978-11-19
- 2309
- 1978-10-23
- 2195
- 1978-06-30
- 2160
- 1978-05-23
- 2157
- 1978-05-20
- 2134
- 1978-04-27
- 1811
- 1977-06-04
- 1803
- 1977-05-27
- 1800
- 1977-05-24
- 1750
- 1977-04-04
- 1687
- 1977-01-29
- 1647
- 1976-12-18