Pulford, G. W. (2007). High-security mechanical locks: An encyclopedic reference. Elsevier Butterworth-Heinemann.
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Dyfyniad Arddull Chicago
Pulford, Graham W. High-security Mechanical Locks: An Encyclopedic Reference. Amsterdam ; Boston: Elsevier Butterworth-Heinemann, 2007.
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Dyfyniad MLA
Pulford, Graham W. High-security Mechanical Locks: An Encyclopedic Reference. Elsevier Butterworth-Heinemann, 2007.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.