Practical methods in ecology and environmental science

av Trivedy, R K; Goel, P K; Trisal, C L
Publicerad 1987

Advances in environmental modelling

av Marani, A, Ed
Publicerad 1988

Ecological methods with special reference to the study of insect populations

av Southwood, T R E
Publicerad 1976

Ecological methods with particular reference to the study of insect populations

av Southwood, T R E
Publicerad 1978