Manual on Larval control operations in malaria programmes text Geneva World Health Organization 1973 eng 199p. : ilus. 28 cm. World Health Organization MALARIA 614.432 3 614.432 3 Wor m 1 INLIS000000000049869 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)