TY  - BOOK
AU  - Hayes, Michael Hilary Bermingham.
TI  - Humic substances II in search of structure
U1  - 631.417 
PY  - 1989///
CY  - Chichester
PB  - Wiley-Interscience
KW  - Acido humico
KW  - Humus
KW  - Suelos
KW  - Fertilidad
ER  -