1. US. Department of Interior, Fish and Wildlife Service Special Scientific Report, Wildlife No. 127 (1969).
2. US. Department of Interior, Fish and Wildlife Service Special Scientific Report, Wildlife No. 184 (1974).
3. US. Department of Interior, Fish and Wildlife Service Special Scientific Report, Wildlife No. 212 (1978).
4. DHEW Publicat,1979
5. Multi-residue method for the determination of chlorinated phenol metabolites in urine