@article{Nicolls2007a,
author = "M. J. Nicolls and C. J. Heinselman and E. A. Hope and S. Ranjan and M. C. Kelley and J. D. Kelly",
title = "Imaging of Polar Mesosphere Summer Echoes with the 450 MHz Poker Flat Advanced Modular Incoherent Scatter Radar",
year = 2007 ,
journal = "Geophys. Res. Lett.",
volume = 34,
number = 2,
keywords = "amisr, pfisr",
doi = "10.1029/2007GL031476"
}