000 00393nam a22001457a 4500
008 160122b xxu||||| |||| 00| 0 eng d
080 _a631.5
100 _aMarr, James C.
245 _aGrading Land for Sufrace Irrigation
_c James C. Marr
250 _a3th. ed.
260 _aCalifornia
_bCircular
_c1957
300 _a53p.
_b
_c
_e
_f
_g
650 _aExploracao Agricola
942 _2udc
_cBK
999 _c34761
_d34761