@article {7370, title = {Note sur un Amaranthus adventice}, journal = {Bull. Soc. Roy. Bot. Belg.}, volume = {80}, year = {1948}, month = {1948///}, pages = {68 - 69}, author = {A. Lawalr{\'e}e} } @article {7371, title = {Adventices int{\'e}ressantes de notre pays}, journal = {Bull. Soc. Roy. Bot. Belg.}, volume = {81}, year = {1949}, month = {1949///}, pages = {40 - 44}, author = {A. Lawalr{\'e}e} } @article {7372, title = {Note compl{\'e}mentaire sur les Ambrosia adventices en Europe occidentale}, journal = {Bull. Soc. Roy. Bot. Belg.}, volume = {87}, year = {1953}, month = {1953///}, pages = {207 - 208}, author = {A. Lawalr{\'e}e} }