The Prairie Papers /
Sixsmith, Ian,author.
Derry, Richard,author.
Volume 1. Large Prairies: 3150-3190, 4100-4179, 5100-5199 -- Volume 2. Large Prairies: 6100, 3100 (of 1938), 8100 classes -- Volume 3. Small Prairies: 4400-4410, 4500-5574 classes.