00377nam a22001097a 4500008004100000082001600041100002400057245006900081260007600150300001900226700002200245150918b        xxu||||| |||| 00| 0 eng d  aTPSb007183  aMercado, Beatriz L.  aLaboratory manual on tropical weed biology /cBeatriz L. Mercado  aLaguna :bCollege of Agriculture, University of the Philippines,c1977.  a101 p. :bill.  aJuliana S. Manuel