TY - JOUR AU - K. Johnson AU - H. Kobulnicky AU - P. Massey AU - Peter Conti BT - The Astrophysical Journal DA - Jan-10-2001 DO - 10.1086/322335 PY - 2001 SP - 864 EP - 877 T2 - The Astrophysical Journal TI - A Sample of Clusters of Extragalactic Ultracompact H II Regions VL - 559 SN - 0004-637X ER -