Friedhelm Teichmann
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Peter Halbach, Carl-D. Sattler, Friedhelm Teichmann, Monika Wahsner;
Characterization of Co-Rich Ferromanganese Crust Fields within the Johnston Island EEZ (Central Pacific), Proceedings of MTS/IEEE OCEANS'87 Conference,
pp. 1015 - 1020, September 1987.