TY  - RPRT
TI  - Approaches to evaluating the effects of VFR towers on flow and safety at airports 
AU  - Joel, L S
AU  - Filliben, J J
AU  - Hare, G B
PY  - 1971
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS RPT 10562
DO  - 10.6028/NBS.RPT.10562
ER  -