Catalogue of Colorado Scarab and Stag BeetlesFrank-Thorsten Krell · First published 2011Open the Tome
Die Schmetterlinge Baden-Württembergs. Band 4Günter Ebert, Norbert Hirneisen, Frank-Thorsten Krell, Rolf Mörtter, Ulrich Ratzel, Armin Siepe, Axel Steiner, Bernd Traub · First published 1994Open the Tome
Die Schmetterlinge Baden-Württembergs. Band 7Axel Steiner, Günter Ebert, Erwin Rennwald, Werner Back, Rene Herrmann, Frank-Thorsten Krell, Thomas Esche, Norbert Hirneisen · First published 1991Open the Tome
