TY - RPRT TI - The seasonal variation of nightglow NaI 5890-96 A, (OI) 5577 A and (OI) 6300 A in the tropics AU - Smith, L L PY - 1966 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS TN 329 DO - 10.6028/NBS.TN.329 ER -