NATIONAL Academy of Sciences text Washington, D.C National Academy of Science 1976 viii, 174 p. ill ; 23 cm GULMA AIR NEGARA BERKEMBANG AQUATIC DEVELOPING COUNTRIES 26.36875 26.36875 INLIS000000000004658 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)