The journal of environmental education (Washington, DC : Heldref Publications, 1969)
v.7-8, no.1-4 (1975-77) - v.9, no.1-4 (1977-78) - v.10, no.1-4 (1978-79) - v.11, no.1-4 (1979-80) - v.12, no.1-4 (1980-81)
Includes index.
Keywords: Ecology -- Study and teaching -- Periodicals; Ecological research -- Periodicals