▁V . ▁Dav ion , ▁B . ▁N orton , ▁C . ▁Pal mer ▁and ▁P . ▁B . ▁Thompson , ▁Ass oc . ▁Ed s . ▁Encyclopedia ▁of ▁Environment al ▁Eth ics ▁and ▁Philosoph y ▁Farm ington ▁Hills , ▁M I : ▁ 2 0 0 8 , ▁G ale - C eng age ▁Learning . ▁P . ▁B . ▁Thompson ▁and ▁T . ▁C . ▁H ilde , ▁Ed s . ▁The ▁Agr arian ▁Ro ots ▁of ▁Prag mat ism . ▁Nash ville , ▁T N : ▁V ander b ilt ▁University ▁Press , ▁ 2 0 0 0 . ▁P . ▁B . ▁Thompson , ▁Agricult ural ▁Eth ics : ▁Research , ▁Te aching ▁and ▁Public ▁Policy , ▁Am es , ▁I A : ▁Iowa ▁State ▁University ▁Press , ▁ 1 9 9 8 . ▁P . B . ▁Thompson , ▁Food ▁Bi ote chn ology ▁in ▁Eth ical ▁Pers pective , ▁London : ▁Chap man ▁and ▁Hall ▁( Black ie ▁Academ ic ▁and ▁Professional ), ▁ 1 9 9 7 . ▁P . B . ▁Thompson , ▁The ▁Spirit ▁of ▁the ▁So il : ▁Agricult ure ▁and ▁Environment al ▁Eth ics , ▁New ▁York ▁and ▁London : ▁Rout ledge ▁Publishing ▁Co ., ▁ 1 9 9 5 . ▁P . B . ▁Thompson , ▁R . ▁Matt he ws , ▁E . O . ▁van ▁Rav ens wa ay , ▁Eth ics , ▁Public ▁Policy , ▁and ▁Agricult ure , ▁New ▁York : ▁Mac mill an , ▁ 1