Ecology. - Keynes, Milton (Great Britain. Open University Press, 1974)
Unit 1-3: Primary production - the process : primary production in ecosystems : consumers in ecosystems.
Units 4-5: Decomposer: whole ecosystems
Units 6-9: Insect populations: populations of plants and vartebrates: general principle of population regulation.
Units 10-11: Climatic factorsedaphio factors,problems of disposal.
Units 12-14: Biotic factors,food chains and symbiosis competitive and other interaction organisms,diversity in communities,discussion of blocks A,B and C.
Units 15-16 : Man and ecosystems: man and communities of organisms.