Institution: | 1. Paleontological Institute, Uppsala University, Uppsala, Sweden 2. Via Rosselli 38, I-21100, Varese, Italy 3. Department of Geology, Syracuse University, 13210, Syracuse, New York, USA 4. Casilla 5281, La Paz, Bolivia 5. Laboratory of Mathematical Geology, Academy of Sciences, V-164, Leningrad, USSR
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