Your Interest in Aquatic Plants: Mr Ghosh is the author of this book, so he is speaking from experience…. and searching I found this following about the book and the author at vanguard books site: I quote:
About this book
not too expensive either …. wonder if its available in the book fair?
… if you are interested you can see these unique creatures of our state in “ILLUSTRATED AQUATIC AND WETLAND PLANTS IN HARMONY WITH MANKIND”.