541
542
543
544
545
546
547
by Ostaszewski, Adam.
Published 1990
548
549
550
551
552
553
554
by Beckmann, George M.
Published 1962
555
556
by Wu, Te-yao.
Published 1979
557
558
by Pollock, Grahame
Published 1990
559
Published 1984
560