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Colwell, F.S., Stormberg, G.J., Phelps, T.J., Birnbaum, S.A., McKinley, J., Rawson, S.A., Veverla, C., Goodwin, S., Long, P.E., Russell, B.F., Garland, T., Thompson, D., Skinner, P., and Grover, S,. 1992. Innovative techniques for collection of saturated and unsaturated subsurface basalts and sediments for microbiological characterization. J. Microbiol. Meth., 15:279-292.

Griffin, W.T., Phelps, T.J., Colwell, F.S., and Fredrickson, J.K., 1997. Methods for obtaining deep subsurface microbiological samples by drilling. In Amy, P.S., and Haldeman, D.L. (Eds.), The Microbiology of the Terrestrial and Deep Subsurface, Boca Raton (CRC Press, Lewis Publishers), 23-43.

Harvey, R.W., George, L.H., Smith, R.L., and LeBlanc, D.R., 1989. Transport of microspheres and indigenous bacteria through a sandy aquifer: results of natural- and forced-gradient tracer experiments. Environ. Sci. Technol., 23:51.

McKinley, J.P., and Colwell, F.S., 1996. Application of perfluorocarbon tracers to microbial sampling in subsurface environments using mud-rotary and air-rotary drilling techniques. J. Microbiol. Meth., 26:1-9.

Plank, T., Ludden, J.N., Escutia, C., et al., in press. Proc. ODP, Init. Repts., 185 [CD-ROM]. Available from: Ocean Drilling Program, Texas A&M University, College Station TX 77845-9547, USA. 

Russell, B.F., Phelps, T.J., Griffin, W.T., and Sargent, K.A., 1992. Procedures for sampling deep subsurface microbial communities in unconsolidated sediments. Groundwater Monitoring Rev., 12:96-104.

Senum, G.I., and Dietz, R.N., 1991. Perfluorocarbon tracer tagging of drilling muds for the assessment of sample contamination. In Fliermans, C.B., and Hazen,T.C. (Eds.), Proc. First Int. Symp. Microbiology of Deep Subsurface. Westinghouse Savannah River Co. Information Service Section Publications Group, 7-145.

Smith, D.C., Spivack, A.J, Fisk, M.R., Haveman, S.A., Staudigel, H. and ODP Leg 185 Shipboard Scientific Party, in press. Drilling-induced microbial contamination of deep-sea crust. Geomicrobiol. J.

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