Plant conservation.

Botanic gardens Oldfield, Sara 2010 Code of practice for the conservation of threatened animals and plants and other species of international significance: as adopted by the senior advisers to ECE governments on environmental and water problems at their fifth session in March 1992 United Nations . Economic Commission For Europe 1992 Plant conservation Hamilton, A. C. 2006 Plant conservation Hamilton, A. C. 2006 Plant genetic resources Ford-Lloyd, Brain 1986