共 53 条
[43]
Powell R.R., 2004, BASIC RES METHODS LI
[46]
Sabo E., 2007, Journal of Tropical Agriculture, V45, P69
[47]
Saleh AG, 2010, WORLD LIB, V18
[48]
Printed information needs of small-scale organic farmers in KwaZulu-Natal
[J].
LIBRI,
2005, 55 (01)
:56-66
[49]
Usman Ghafoor Usman Ghafoor, 2008, Pakistan Journal of Agricultural Sciences, V45, P520
[50]
Wathen CN, 2006, INFORM RES, V11