MÖSSBAUER SPECTROSCOPY STUDIES OF POLYACETYLENE DOPED CHEMICALLY AND ELECTROCHEMICALLY WITH IRON CHLORIDES Z. Kucharski, M. Łukasiak, J. Suwalski and A. Proń J. Phys. Colloques, 44 C3 (1983) C3-321-C3-324 DOI: 10.1051/jphyscol:1983363