by Chang, Bernard S | Schachter, Steven C | Schomer, Donald L | ProQuest (Firm).
by Schmitz, Bettina, 1960- | Tettenborn, Barbara | Schomer, Donald L | ProQuest (Firm).
by Niedermeyer, Ernst, 1920- | Schomer, Donald L | Lopes da Silva, F. H, 1935-.