. . . "Standard practice for the design and operation of precipitation enhancement projects" . "Standard practice for the design and operation of precipitation enhancement projects"@en . "Electronic books" . "Electronic books"@en . . . . . . . . . . . . . . . . . "Livres électroniques" . . . . . "NATURE / Weather" . . "SCIENCE / Earth Sciences / Meteorology & Climatology" . .