Open Source GIS: A GRASS GIS Approach

Open Source GIS: A GRASS GIS Approach by Neteler, Markus|Mitasova, Helena

Open Source GIS: A GRASS GIS Approach (The Springer International Series in...

Beginning MapServer: Open Source GIS Development (Expert's Voice in Open Sou...

Open Source GIS: A GRASS GIS Approach by Markus Neteler: Used

GIS: A Visual Approach, Davis, Bruce

Beginning Mapserver: Open Source GIS Development by Kropla, Bill

Remote Sensing and GIS for Ecologists: Using Open Source Software