- 869
- 1974-10-22
science: الجيولوجيا
- 842
- 1974-09-23
- 830
- 1974-09-11
- 829
- 1974-09-10
- 733
- 1974-06-06
- 727
- 1974-05-31
- 707
- 1974-05-11
- 700
- 1974-05-04
- 694
- 1974-04-28
- 674
- 1974-04-08
- 618
- 1974-02-11
- 606
- 1974-01-30
- 543
- 1973-11-23
- 519
- 1973-10-24
- 512
- 1973-10-17
- 510
- 1973-10-15
- 441
- 1973-07-27
- 429
- 1973-07-13
- 293
- 1973-02-05
- 245
- 1972-12-07