- 2150
- 1978-05-13
education: البحث العلمي
- 2139
- 1978-05-02
- 2133
- 1978-04-26
- 2128
- 1978-04-21
- 2100
- 1978-03-24
- 2070
- 1978-02-22
- 2052
- 1978-02-04
- 2031
- 1978-01-14
- 2028
- 1978-01-11
- 2026
- 1978-01-09
- 2016
- 1977-12-30
- 1997
- 1977-12-10
- 1988
- 1977-12-01
- 1945
- 1977-10-19
- 1805
- 1977-05-29
- 1648
- 1976-12-19
- 1495
- 1976-07-16
- 1383
- 1976-03-26
- 1374
- 1976-03-17
- 1329
- 1976-01-31