Klein, L. A. Traffic Flow Sensors: Technologies, Operating Principles, and Archetypes. SPIE Digital Library.
Chicago-viite (17. p.)Klein, Lawrence A. Traffic Flow Sensors: Technologies, Operating Principles, and Archetypes. SPIE Digital Library.
MLA-viite (9. p.)Klein, Lawrence A. Traffic Flow Sensors: Technologies, Operating Principles, and Archetypes. SPIE Digital Library.
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