by Frank M. D'Itri
by Patricia L. Miketta
by Filiberto Menna
by John McLellan
by Renn Tolman
by Helmut Meier
by Madeline Harrison Caviness
by Nurith Kenaan-Kedar
by Moray House School of Education
by Marion F Jurko
by Dorthea Atwater
by Dan Hope
by Roger E Meyer
by Thomas Tsakalakos
by H.J. Braunholtz
by Jesse L. Coburn
by Frederick C. Giffin
by American Water Works Association Standards Committee on Fire Hydrants
by John Francis Parker