An empirical investigation into the determinants of travel time /

por Prendergast, L.S., Prendergast, L.S., Williams, R. D.
Publicado 1980

Communication of weed science technologies in developing countries : proceedings /

por Symposium sponsored by the International Weed Science Society and the Weed Science Society of America (1st. : 1983 : St. Louis, Mo)
Publicado 1983