Adapted drawings: From THE WAY LIFE WORKS by Mahlon Hoagland and Bert Dodson, copyright © 1995 by Mahlon Hoagland and Bert Dodson.
Kohandatud joonised: From THE WAY LIFE WORKS by Mahlon Hoagland and Bert Dodson, copyright © 1995 by Mahlon Hoagland and Bert Dodson.