EFFET RAMAN ET THÉORIERAMAN SCATTERING FROM FERROELECTRIC MODES IN THE KDP ISOMORPHOUS PHOSPHATES AND ARSENATES J. F. RYAN, R. S. KATIYAR and W. TAYLOR J. Phys. Colloques, 33 C2 (1972) C2-49-C2-51 DOI: 10.1051/jphyscol:1972211