000 00305 a2200121 4500
080 _a631.6:378.99(04)
_bU 58 P
245 1 _aPapers presented in the panel
260 _aPeru
_bNational Agrarian University
_c1969
650 _aAgricultural Engineering
100 _a
_d
300 _a305 p.
901 _a106658
999 _c45019
_d45019