TY - BOOK ID - 135777532 TI - Development, testing, and evaluation of visual landing aids : consolidated progress report for the period October 1 to December 31, 1955 PY - 1956 PB - Gaithersburg, MD : U.S. Dept. of Commerce, National Institute of Standards and Technology, DB - UniCat KW - Landing aids (Aeronautics) UR - https://www.unicat.be/uniCat?func=search&query=sysid:135777532 AB - ER -