TY  - BOOK
AU  - Wallace,T.
TI  - The diagnosis of mineral deficiencies in plants by visual symptoms: a colour atlas and guide 
U1  - 581.1335 
PY  - 1961///
CY  - London
PB  - H. M. Stationery Off.
KW  - Deficiency diseases in plants
N1  - Includes index and bibliographies
ER  -