1. The principles of field drainage;Nicholson,1953
2. The operation of mole drains;Nicholson;Agricultural Progress,1934
3. The role of field drains in removing excess water from the soil I. Some observations on the rates of flow from outfalls;Nicholson,1934
4. Studies in mole drainage: interim report on an experimental drainage field;Childs,1943
5. Observations on the soil water regime in a drained clay soil;Trafford;Journal of Soil Science,1972