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Bus traffic (Btahb)

Computer viruses ()
Transportation operations (B)
     Related Term (Associative): Management and organization (C)
    Traffic (Bt)
         Related Term (Associative): Freight and passenger traffic (Bf); Traffic control (Dcmt); Traffic crashes (Hbbgt)
        Traffic by mode (Bta)
            Highway traffic (Btah)
                Bus traffic (Btahb)
                Truck traffic (Btaht)