%0 Journal Article %T A semi-distributed ntegrated itrogen model for multiple source assessment in tchments (INCA): Part I — model structure and process equations %A WHITEHEAD, P %A WILSON, E %A BUTTERFIELD, D %A , %J Science of The Total Environment %V 210-211 %P 547-558 %@ 0048-9697 %D 1998-03-24 %I Elsevier BV %~ DeepDyve