'frees contribute a major part of fuel, fodder and fruit, and are an im of bioenergy. They are now needed in large numbers more portant source than ever before

This paper addresses questions of quasi-isometric rigidity and classification for fundamental groups of finite graphs of groups, under the assumption that the B

This well-illustrated seven-volume work (1906-13) covers the varieties, distribution, history and cultivation of tree species in the British Isles.