13 C-magnetic shielding of CH 4 and CO 2 in binary mixtures with krypton and xenon Jackowski, K. ; Dayan, E. ; Raynes, W. T. Abstract Publication: Molecular Physics Pub Date: October 1977 DOI: 10.1080/00268977700102441 Bibcode: 1977MolPh..34.1189J