Home › Authors › Michelle M. Frey 👤 Michelle M. Frey 4 books Books by Michelle M. Frey Distribution system water quality challenges in the 21st century 2005 Occurrence survey of boron and Occurrence survey of boron and hexavalent chromium 2004 Practical application of onlin Practical application of online monitoring 2004 Critical evaluation of Cryptosporidium research and research needs 1998