TY  - BOOK
AU  - Weldon, L.W.
TI  - Common aquatic weeds
U1  - 632.5(204) L3 
PY  - 1973///
CY  - New York
PB  - Dover publications, Inc.
KW  -  L.W.Weldon, R.D.Blackburn and D.S.Harrison.
KW  - Blackburn, R.D., joint author
KW  - Harrison, D.S., joint author
KW  - Aquatic weeds
ER  -