. . . . . . . "Bibliography"@en . "A Review of the patents and literature on the manufacture of potassium nitrate with notes on its occurrence and uses" . . . . . . "A Review of the Patents and Literature on the Manufacture of Potassium Nitrate, with notes on its occurrence and uses"@en . "A Review of the patents and literature on the manufacture of potassium nitrate with notes on its occurrence and uses, by Colin W. Whittaker,... and Frank O. Lundstrom" . . . "A review of the patents and literature on the manufacture of potassium nitrate with notes on its occurrence and uses"@en . .