TY  - BOOK
TI  - Tracer techniques, 1967-1974
T2  - Commonwealth Bureau of Soils Annotated Bibliography; no.1699
U1  - PH 016 1967/74 :631.417.7:621.039.85 L5 
PY  - 1974///
CY  - Herpenden (England)
PB  - Commonwealth Agricultural Bureaux
ER  -