pdf Environmental Systems and Societies – Study and Revision Guide – Davis and Nagle – Second Edition – Hodder 2017.pdf
pdf Environmental Systems and Societies – Andrew Davis and Garrett Nagle – Second Edition – Pearson 2015.pdf
pdf Biology for the IB Diploma Coursebook by Brenda Walpole, Ashby Merson-Davies, Dr Leighton Dann, Dr Peter Hoeben (z-lib.org).pdf
