00443     2200157   4500001002100000008004100021035002000062245006300082100001400145260004400159300003500203084001200238082000800250650001300258990001400271INLIS000000000008793                                   Ind    a0010-1118008793  aUber topologische eigenschaften von strukturencRIDDER, J.  aJ. Ridder  aAmsterdambN.V. Noord Hollandschec1945  a43 p. ; 26 cm.c43 p. ; 26 cm.  a513RIDu  a513  aGEOMETRY  amfn-10572