000 00260 a2200121 4500
082 _a631.4
_bUn3t
245 1 _aTECHNICAL MEMORANDUM
260 _a
_b
_c
300 _a
440 _aTechnical Memorandum
_vNo. 646
964 _gCIRC
997 _aA6983 v. 646 s C
999 _c458262
_d458262