TY  - BOOK
AU  - Gray,A N
ED  - International Superphosphate Manufacturers' Association.
TI  - Phosphates and superphosphate
U1  - 631.85 22
PY  - 1944///
CY  - London
PB  - Pub. under the auspices of the International superphosphate manufacturers' association by E. T. Heron & co., ltd.
KW  - Phosphates
N1  - "Second edition."; Map on lining-papers; "Corrigenda" slip inserted before p. 9
ER  -