Some references I've managed to dig out:
 
Anderson, J.F. and M.A. Wojtas. 1986. Honey bees contaminated with
pesticides and polychlorinated biphenyls. J. Econ. Entomol. 79: 1200-1205.
 
Bromenshenk, J.J. et al. 1985. Pollution monitoring of Puget Sound with
honey bees. Science 227: 632-634.
 
De Jong, D. et al. 1977. Selenium in pollen gathered by bees foraging on
fly ash-grown plants. Bull. Environ. Contam. Toxicol. 18: 442-444.
 
Gilbert, M.D. and D.J. Lisk. 1978. Honey as an environmental indicator of
radionuclide contamination. Bull. Environ. Contam. Toxicol. 19: 32-34.
 
Morse, R.A. et al. 1987. Polychlorinated biphenyls in honey bees. Bull.
Environ. Contam. Toxicol. 38: 271-276.
 
Morse, R.A. et al. 1980. Analysis of radioactivity in honeys produced
near Three-Mile Island nuclear power plant. Nutr. Rpts. Int. 22: 319-322.
 
Morse, R.A. and D.J. Lisk. 1980. Elemental analysis of honeys from
several nations. Am. Bee J. 120: 522-523.
 
Tong, S.S.C. et al. 1975. Elemental analysis of honey as an indicator of
pollution. Arch. Environ. Health 30: 329-332.
 
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