- 2157
- 1978-05-20
technology: الطاقة الشمسية
- 2156
- 1978-05-19
- 2138
- 1978-05-01
- 2134
- 1978-04-27
- 2128
- 1978-04-21
- 2085
- 1978-03-09
- 2082
- 1978-03-06
- 2062
- 1978-02-14
- 1934
- 1977-10-08
- 1929
- 1977-10-03
- 1895
- 1977-08-28
- 1894
- 1977-08-27
- 1859
- 1977-07-23
- 1857
- 1977-07-21
- 1811
- 1977-06-04
- 1754
- 1977-04-08
- 1751
- 1977-04-05
- 1750
- 1977-04-04
- 1749
- 1977-04-03
- 1748
- 1977-04-02