@article {8415, title = {A note on Conyza sumatrensis (Retz.) E. Walker (C. floribunda Kunth).}, journal = {Watsonia}, volume = {10}, year = {1974}, month = {1974///}, pages = {166 - 167}, author = {J.B. Marshall} } @article {8422, title = {On Conyza sumatrensis (Retz.) E. Walker and certain hybrids in the genus}, journal = {Watsonia}, volume = {17}, year = {1988}, month = {1988///}, pages = {172 - 173}, author = {D. McClintock and J.B. Marshall} } @article {8424, title = {Conyza-taxa found in Britain}, journal = {Watsonia}, volume = {9}, year = {1973}, month = {1973///}, pages = {372 - 373}, author = {J.B. Marshall} }