TY - JOUR AU - Ludwig Oster BT - Astronomy and Astrophysics N1 - JILA Pub. 642 PY - 1970 SE - 318 SP - 318 EP - 320 T2 - Astronomy and Astrophysics TI - The Free-Free Emission and Absorption Coefficients in the Radio Frequency Range at Very Low Temperatures UR - http://adsabs.harvard.edu/full/1970A\%26A.....9..318O VL - 9 ER -