Cayne Bernard , S. (1990). World topics yearbook 1990: A review of the events of 1989. Education Center.
Chicago-čujuhus (17. p.)Cayne Bernard , S. World Topics Yearbook 1990: A Review of the Events of 1989. Education Center, 1990.
MLA-čujuhus (9. p.)Cayne Bernard , S. World Topics Yearbook 1990: A Review of the Events of 1989. Education Center, 1990.
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