Stadler, Soledad, and Guido Fernando Botta. 2015. “artial haracterization of gricultural-achinery ontractor ervices in the icro egion a ampa rovince, rgentina”. evista e a acultad e iencias grarias NCuyo 47 (2):135-43. https://revistas.apps.sid.uncu.edu.ar/ojs3/index.php/RFCA/article/view/3309.