Direct Steerable Pipe ThrustingJon Robison, Jeff Scholl, Andrew Sparks, Joachim Engelhardt, Andrew Finney · First published 2023Open the Tome
Wirklichkeit im Zeitalter ihres VerschwindensClaus Urban, Joachim Engelhardt · First published 2000Open the Tome
Naturerlebnis Baden-WürttembergOttmar Engelhardt, Ernst Waldemar Bauer, Joachim Genser · First published 1997Open the Tome
