TY - ECHAP AU - David Hummer CY - Dordrecht DO - 10.1007/978-94-011-3554-2_41 M1 - NATO ASI Series PB - Springer Netherlands PP - Dordrecht PY - 1991 SN - 978-94-010-5574-1 SP - 431 EP - 439 TI - The Opacity Project and the Practical Utilization of Atomic Data VL - 341 ER -