共 18 条
[1]
[Anonymous], 2004, MON STEM CELL RES
[2]
Bush GW, 2005, Office of the Press Secretary
[3]
Callicott J.Baird., 1989, DEFENSE LAND ETHIC E
[7]
Kempton Willett., 1995, ENV VALUES AM CULTUR
[8]
KOLATA G, 2005, NY TIMES 0520, pA1
[9]
Leopold Aldo, 1989, A Sand County almanac, and sketches here and there