STEWART, P. (1964). Sound and light unit. Encyclopa-edia Britanica Press.
Chicago-čujuhus (17. p.)STEWART, P.E. Sound and Light Unit. Chicago: Encyclopa-edia Britanica Press, 1964.
MLA-čujuhus (9. p.)STEWART, P.E. Sound and Light Unit. Encyclopa-edia Britanica Press, 1964.
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