by Leigh, J. Paul, Stephen A. Mc Curdy, Schenker, Marc B.
Published in Public health reports (1974) (01.05.2001)

by Farrar, J.A. (University of California, Davis, CA.), Schenker, M.B, McCurdy, S.A, Morrin, L.A
Published in Journal of agromedicine (27.06.1995)