TY - CPAPER AU - David Hummer CY - Tatranska Lomnica, Czechoslovakia DA - 00/1968 N1 - JILA Pub. 334 PB - Dordrecht, D. Reidel Pub. Co. PP - Tatranska Lomnica, Czechoslovakia PY - 1968 TI - Radiative Transfer Processes in Planetary Nebulae UR - http://articles.adsabs.harvard.edu/full/1968IAUS...34..166H ER -