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by Filbey, E. J.; Stopp, Gerald D.; Phelps, V. V.
by Parkinson, Stephen
by Petersen, Peter B.
by Sherwood, Frank P.
by Gé; Za T. Teré; Zhalmy (Case Western Reserve University, Cleveland, Ohio); et al.
by Blokdijk, Gerard
by Unknown
by Holaind, Rene Isidore
by Barnhill, R.