1
by Gunther, Francis A., Gunther, Jane Davies
Published 1982
Springer New York
Table of Contents: ... and Determination of Pesticide Residues in South Africa -- Regulating OP Pesticide Residues for Farmworker...

2
by Gunther, Francis A.
Published 1971
Springer New York
Table of Contents: ... in South Africa -- Interaction between herbicides and soil microorganisms -- Pesticide and growth regulator...