00445nam a2200181 a 450000100080000000500110000800800410001910000190006024500640007926000300014330000100017365000110018365000090019465300120020370000130021570000160022870000190024418446631992-10-19       1976    bl uuuu     u0uu1 u    #d1 aFORSTER, D. L.  aReduced tillage systems for conservation and profitability.  a[S.l.: s.n.], 1976.c1976  a10 p.  aManejo  aSolo  aSistema1 aRASK, N.1 aBONE, S. W.1 aSCHURLE, B. W.