000 00292nam a22001217a 4500
040 _cPT
082 _a630 ASH 1986 C284
100 _aJ. ASHTON and R.F. LORD
245 _aresearch, education and agriculture
260 _aUSA
_bJ. ASHTON and R.F. LORD
_c1986
300 _a186p;
942 _cEK
999 _c11173
_d11173