00367cam a2200121ua 4500041001000000082001900010100001800029245009500047250001200142260007400154300001200228504000500240  aengh  a631.45bSHE/SO  aShang, T C  .  aSoil conservation for small farmers in the humid tropics / cT C Shang.hTextual Documents  a1 / b.  aRome : bFood and Agriculture organization of United States , c1989.  a103 ; .  a