by Rickard, W. H., Hedlund, J. D., Fitzner, R. E.
Published in Science (American Association for the Advancement of Science) (27.05.1977)

by Hedlund, J D
Published in Health physics (1958) (01.02.1976)

by O'Farrell, T P, Hedlund, J D, Olson, R J, Gilbert, R O
Published in Radiation research (01.03.1972)

by Rickard, W. H., Hedlund, J. D., Sweany, H. A.
Published in Arctic and alpine research (01.08.1975)

by Rickard, W. H., Hedlund, J. D., Sweany, H. A.
Published in Arctic and alpine research (1975)

by Boone, S.G, Hedlund, J.D
Published in Soil conservation (1972)

by O'Farrell, Thomas P., Hedlund, John D., Olson, Richard J., Gilbert, Richard O.
Published in Science (American Association for the Advancement of Science) (19.01.1973)