Berlin, H. M. (1985). 555 timer applications sourcebook, with experiments. BPB Pub.
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Chicago-čujuhus (17. p.)
Berlin, Howard M. 555 Timer Applications Sourcebook, with Experiments. New Delhi: BPB Pub, 1985.
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MLA-čujuhus (9. p.)
Berlin, Howard M. 555 Timer Applications Sourcebook, with Experiments. BPB Pub, 1985.
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