Het kind als spiegel van de beschavingW. Koops, B. Levering, Micha de Winter · First published 2007Open the Tome
Kennedy CrisesMontague Kern, Patricia W. Levering, Ralph B. Levering · First published 1984Open the Tome
Citizen Action for Global ChangeRalph B. Levering, Miriam L. Levering · First published 1999Open the Tome
The public and American foreign policy, 1918-1978Ralph B. Levering · First published 1978Open the Tome
American opinion and the Russian alliance, 1939-1945Ralph B. Levering · First published 1976Open the Tome
