The Radiological Society of North America. (1981). Radiology Volume 138 number 2 February 1981. The radiological society.
Chicago-čujuhus (17. p.)The Radiological Society of North America. Radiology Volume 138 Number 2 February 1981. : The radiological society, 1981.
MLA-čujuhus (9. p.)The Radiological Society of North America. Radiology Volume 138 Number 2 February 1981. The radiological society, 1981.
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