Science, Maths & Technology
Challenge: Make paper and ink
...Families and Genera of Woody Plants of Northwest South America: (Colombia, Ecuador, Peru): With Supplementary Notes) by Alwyn H. Gentry and Adrian B. Forsyth, University of Chicago Press1996; ISBN: 0226289443 (An excellent resource on learning to identify tropical plants in the field/forest) Encyclopedia of Common Natural Ingredients Used in Food, Drugs, and Cosmetics by...