1
Advances in soil organic matter research: the impact on agriculture and the environment : advances in soil organic matter research: the impact on agriculture and the environment: joint meeting: proceedings : Colchester, 03.09.90-04.09.90 /
Book
2
Advances in nitrogen cycling in agricultural ecosystems : Symposium on advances in nitrogen cycling in agricultural ecosystems: proceedings : Brisbane, 11.05.87-15.05.87 /
Book