Mcdonagh, J. and Hillyer, A. (1999) Soil fertility, legumes and livelihoods in northern Namibia. DFID Plant Sciences Research Programme Annual Programme Report. pp. 39-47.
Murnane, RJ, Sarmiento, JL and Le Quere, C ORCID: https://orcid.org/0000-0003-2319-0452 (1999) Spatial distribution of air-sea CO2 fluxes and the interhemispheric transport of carbon by the oceans. Global Biogeochemical Cycles, 13 (2). pp. 287-305. ISSN 0886-6236