TY - GEN AU - Judith F Gilsinn. C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1978-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.77-1386 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1978 TI - Problems in world-wide standardization of the units of altitude measurement: ER -