574.5
Ene
E
Energy and the environment ; a series of public lectures presented in the H. R. MacMillan
Planetarium during the autumn of 1971.Ed. by Ian E. Effordand Barbara M. Smith.
Vancourver , Institute of ResourcesEcology,Iniversity of British Columbia , 1972.
220p. ilus. 22 cm . ( H. R. MacMillan lectures for 1971)