RAMAN STUDY OF La2-xBaxCuO4 (x= 0, 0.016) SINGLE CRYSTALS N. Koshizuka, H. Unoki, K. Oka, K. Hayashi, T. Okuda and Y. Kimura J. Phys. Colloques, 49 C8 (1988) C8-2137-C8-2138 DOI: 10.1051/jphyscol:19888956