00270nam a2200109Ia 450000500170000008000190001710000160003624500430005226000300009530000160012558300190014120260716043032.0  a07.01.01 S8965  aStrak, John  aMeasurement of agricultural protection  bMacmillanaLondonGBc1982  axvi, 120 p.  c3/7/00kM2LMGR