501
502
503
504
505
506
by Wittenberg, Andreas F.
Published 2009
Published 2009
Book
507
by Strelka, Joseph P.
Published 1999
Published 1999
Book
508
509
510
by Guthke, Karl S.
Published 2000
Published 2000
Book
511
512
513
516
by Noack, Lothar
Published 1999
Published 1999
Book
517
518
519
520