TY - JOUR
AU - Piero Madau
AU - J. Shull
BT - The Astrophysical Journal
DA - Jan-02-1996
DO - 10.1086/176751
PY - 1996
EP - 551
T2 - The Astrophysical Journal
TI - Cosmic Metal Production and the Contribution of QSO Absorption Systems to the Ionizing Background
UR - http://adsabs.harvard.edu/full/1996ApJ...457..551M
VL - 457
SN - 0004-637X
ER -