Ask
1. Why biological weapons?
2. How was gas used in the Great War?
3. What types of gases were used?
4. What were the effects?
Books
Chemical & Biological Weapons in Our Times
by Herbert M. Levine
358 LEV
The War to End All Wars: World War I
by Russell Freedman
940.3 FRE
Weapons and Technology of WWI
by Paul Dowswell
940.4 DOW
World War I: Almanac
by Tom Pendergast and Sara Pendergast
R 940.3 PEN
World War I: Primary Sources
by Tom Pendergast and Sara Pendergast
R 940.3 PEN
Weapons of World War I
by John Hamilton
940.4 HAM