A student's dictionary of Classical and Medieval ChinesePaul W. Kroll · First published 2014Open the Tome
The joy of belongingWoodrow Michael Kroll, W. Kroll, Woodrow Kroll · First published 1996Open the Tome
Der oxydative Abbau von Huminsaeuren in Gegenwart von KieselsaeureW. Kroll · First published 1958Open the Tome