ABSTRACT
Allen, M.J., RH.Taylor and E. Geldreich. 1980. The occurrence of microorganisms in water main encrustations. J. Am. Water Works Assoc. 72, 614-625.
Amann, R.J., W. Ludwig and K.H. Schleifer. 1995. Phylogenetic identification and in situ detection of individual microbial cells without cultivation. Microbiol. Rev. 59, 143-169.
