00529     2200169   4500001002100000008004100021035002000062245011300082100001700195260002200212300004900234084001400283082001000297650001500307650002300322990001400345INLIS000000000024907                                   Ind    a0010-1218006745  aAn illustrated guide to ciliated protozoa used as biological indicators in freshwater ecologycBICK, Hartmut  aHartmut Bick  a[s.l.]bWHOc1969  a20 p. : ill. ; 28 cm.c20 p. : ill. ; 28 cm.  a593.1BICi  a593.1  aCILIOPHORA  aFRESHWATER ECOLOGY  amfn-26762