1. (1968). . , .:
  2. .. . (1991). , . ޣ , , , 128 .
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  4. Underwood James R.(Jr) (1992). Al Umchaimin depression, Western Iraq: an impact structure?. Pap. Present. Int. Conf. Large Meteorite Impacts and Planet. Evol., Sudbury, Aug. 31 - Sept. 2, 1992 , Houston (Tex.), P. 77
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