BERLIN H.M. (1985). THE 555 TIMER APPLICATION SOURCE BOOK WITH EXPERIMENTS. BPB PUB.
Chicago-čujuhus (17. p.)BERLIN H.M. THE 555 TIMER APPLICATION SOURCE BOOK WITH EXPERIMENTS. BPB PUB, 1985.
MLA-čujuhus (9. p.)BERLIN H.M. THE 555 TIMER APPLICATION SOURCE BOOK WITH EXPERIMENTS. BPB PUB, 1985.
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