1.
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Paris, France : Organisation for Economic Co-Operation and Development, 1993.
English | G 252 OECD.T |
|
2.
|
Cambridge : National Institute of Agricultural Botany, 1997. First edition.
English | S 90 WEL.C |
|
3.
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New York : CABI Pub., 2002.
English | S 191 EVE.C |
|