ENHANCED NUCLEAR RESONANCE SCATTERING IN DYNAMICAL DIFFRACTION OF GAMMA-RAYS U. Van Bürck, G.V. Smirnov, R.L. Mössbauer, H.J. Maurus and N.A. Semioschkina J. Phys. Colloques, 41 C1 (1980) C1-469 DOI: 10.1051/jphyscol:19801184