1. Dutky, S.R., Robbins, W.E., and Thompson, J.V. (1967)Nematologica 13, 140.
2. Hieb, W.F., and Rothstein, M. (1968)Science 160, 778–780.
3. Cole, R.J., and Dutky, S.R. (1969)J. Nematol. 1, 72–75.
4. Bolla, R. (1979)J. Nematol. 11, 250–259.
5. Cole, R.J., and Krusberg, L.R. (1968)Life Sciences 7, 713–724.