Gilbreath, G. C. Active and Passive Signatures V. SPIE Digital Library.
Chicago-čujuhus (17. p.)Gilbreath, G. Charmaine. Active and Passive Signatures V. SPIE Digital Library.
MLA-čujuhus (9. p.)Gilbreath, G. Charmaine. Active and Passive Signatures V. SPIE Digital Library.
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