@book{bhlpg52023121, title = {The Bean bag }, volume = {no.38 (1993:Nov.)}, url = {https://www.biodiversitylibrary.org/page/52023121}, publisher = {Royal Botanic Gardens, Kew}, author = {Cowan, Richard S., 1921 -1997}, year = {1993}, pages = {Page 16}, }