NON LINEAR MIR GENERATION IN AMMONIA PUMPED BY A CONTINUOUSLY TUNABLE CO2 LASER M. BERNARDINI, F. D'AMATO, M. GIORGI et S. MARCHETTI J. Phys. Colloques, 48 C7 (1987) C7-439-C7-442 DOI: 10.1051/jphyscol:19877104