by BERGUM B,US
Year of Publication 06.11.1973

by YOUNGQUIST J,US, BERGUM B,US
Year of Publication 08.01.1974

by BERGUM B,US, LONNEBOTN T,US
Year of Publication 26.06.1973

by BERGUM B,US, ANDERSON K,US, BILHORN J,US
Year of Publication 22.05.1973

by YOUNGQUIST J,US, MACAULAY W,US, BERGUM B,US, KENYON K,US, BILHORN J,US
Year of Publication 06.11.1973