981
by Zemp, Hugo
Published 2009
Documentary Educational Resources (DER)

982
by Wenger, Allan
Published 2000
ZED

983
by Wenger, Allan
Published 2000
ZED

984
by Wenger, Allan
Published 2000
ZED

985
by Ségur, Benoît
Published 2000
ZED

986
by Hermann, Courtney
Published 2007
Documentary Educational Resources

987
by Salamone, Frank A.
Published 2011
Privately Published

988
by Marshall, John
Published 2009
Documentary Educational Resources (DER)

989
by Marshall, John
Published 1974
Documentary Educational Resources (DER)

990
by Catteau, Manuel
Published 2007
ZED

991
by Coyote, Peter
Published 2003
ZED