APPLICATIONS OF PHOTOACOUSTIC AND DIFFUSE REFLECTANCE SPECTROSCOPY IN MINERALS FLOTATION V. Plichon, J.L. Cecile, S. Boissay and M. Maillot J. Phys. Colloques, 44 C6 (1983) C6-109-C6-113 DOI: 10.1051/jphyscol:1983616