00538nam a22001457a 4500003000400000005001700004008004100021040001400062100002500076245009900101260000900200300002900209500012300238504003100361OSt20171010095451.0120627t        xxu||||| |||| 00| 0 eng d  aMMSUcULS  aSabigan, Norwell A.   aDesign, construction and evaluation of hand tractor-drawn-ride-on levelercNorwell A. Sabigan   c2008  axiv, 56 leaves c28 cm.   aThesis (BS Agricultural Engineering) -- Mariano Marcos State University-College of Agriculture & Forestry, Batac City   aBibliography: leaves 34-35