Annual report - 2002 Darrin Fresh Water Institute Aquatic Plant Identification Program
, 2003 Eichler, Lawrence W.
core
Annual report - 1991 Rensselaer Fresh Water Institute Aquatic Plant Identification Program
, 1992 Bombard, Robert T., Eichler, Lawrence W.
core
Annual report - 2000 Darrin Fresh Water Institute Aquatic Plant Identification Program
, 2001 Eichler, Lawrence W.
core
Annual report-1999 Darrin Fresh Water Institute Aquatic Plant Identification Program
, 2000 Eichler, Lawrence W.
core
Annual report - 2007 Darrin Fresh Water Institute Aquatic Plant Identification Program
, 2007 Eichler, Lawrence W.
core
Annual Report - 1989 Rensselaer Fresh Water Institute Aquatic Plant Identification Program
, 1990 Madsen, John D., Taggett, Leslie J.
core
Annual report - 2001 Darrin Fresh Water Institute Aquatic Plant Identification Program
, 2002 Eichler, Lawrence W.
core
Annual report - 2003 Darrin Fresh Water Institute Aquatic Plant Identification Program
, 2004 Eichler, Lawrence W.
core
Annual Report - 2008 Darrin Fresh Water Institute Aquatic Plant Identification Program
, 2009 Eichler, Lawrence W.
core
Annual report - 1994 Rensselaer Fresh Water Institute Aquatic Plant Identification Program
, 1995 Eichler, Lawrence W.
core