Photo copyright ©1998 Andrei Lapenis.
Lapenis, A.G., Torn, M.S., Harden, J.W., Holloker, K., Babikov, B., Timofeev, A.I., Hornberger, M.I., Nattis, R. 2000. Scientists Unearth Truth about Soil Contamination. EOS, Transactions, Amer. Geophys. Union, 81 (6) pp. 53, 59-60.