I have seen a personal copy but presently not with me. You can contact with the librarian of the Botany Dept., Ballygunge Science College, Calcutta University. Prof Mukerjee was working in the said department when he published the book. He might have given a complimentary copy there.
Availability of the book is rare our area, which is not available at Southern regional centre( Coimbatore) as well as in Deccan circle ( Hyderabad) of BSI