TY - BOOK ID - 138836481 TI - Traffic control devices, 1983 PY - 1983 SN - 0309036151 PB - Washington (D.C.): National academy of sciences DB - UniCat KW - Traffic signs and signals UR - https://www.unicat.be/uniCat?func=search&query=sysid:138836481 AB - ER -