- FondsHowardA - The papers of Sir Albert Howard
- SubfondsA - Professional papers of AH
- Series1 - Publications
- File4 - 1937
- Item1 - The restoration and maintenance of fertility
- Item2 - Declining soil fertility
- Item3 - Soil fertility
- Item4 - Worms
- Item5 - Soil fertility, food production and public health
- 11 more...