Books by Philip Wayland Porter
Challenging nature
Food and development in the se
Food and development in the semi-arid zone of east Africa
Potential photosynthesis and a
Potential photosynthesis and agriculture in Tanzania
A pilot study to determine the
A pilot study to determine the feasibility of creating a new vegetation map of Tanzania
Benin to Bahia
Benin to Bahia
Population distribution and la
Population distribution and land use in Liberia