WELCH, Paul S. text New York, Toronto, London] McGraw-Hill Book Company, Inc. 1952 Ed. 2 eng ix, 538 p. : ill. ; 24 cm. Paul S. Welch bibl.: p. 443-510 index: p. 511-538 LIMNOLOGY BOTANY ZOOLOGY 551.312 551.312 WEL l 221008 20221008125818 INLIS000000000056384 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)