Phosphates and superphosphate - Gray, A N; International Superphosphate Manufacturers' Association (London : Pub. under the auspices of the International superphosphate manufacturers' association by E. T. Heron & co., ltd., 1944)
"Second edition."
Map on lining-papers.
"Corrigenda" slip inserted before p. 9.
IMRAN
Keywords: Phosphates