BiblioVault may have an electronic file which would meet your requirements for this title:
Aquatic and Wetland Plants of Northeastern North America, Volume I: A Revised and Enlarged Edition of Norman C. Fassett's A Manual of Aquatic Plants, Volume I: Pteridphytes, Gymnosperms, and Angiosperms: Dicotyledons
Garrett E. Crow and C. Barre Hellquist
Paper: 978-0-299-16334-1
Cloth: 978-0-299-16330-3
Electronic: 978-0-299-16333-4