TY - JOUR
AU - A. Pradhan
AU - J. Shull
BT - The Astrophysical Journal
DA - Jan-10-1981
DO - 10.1086/159340
PY - 1981
EP - 821
T2 - The Astrophysical Journal
TI - Density and Temperature Diagnostics of X-Ray Sources - Line Ratios for Helium-Like Ions
UR - http://adsabs.harvard.edu/full/1981ApJ...249..821P
VL - 249
SN - 0004-637X
ER -