1. Zones of Equal Temperature : mean minimum temperature [for the year]. Published / Created: 19--?]. Call Number: 75CFH 1900 Container / Volume: BRBL_00409 Image Count: 1 Resource Type: Maps, Atlases & Globes Description: Maps labeled "Appendix 20-1" through "Appendix 20-4". Publisher: A. Hoen & Co., Lith., Subject (Geographic): United States--Maps Found in: Beinecke Rare Book and Manuscript Library > Zones of Equal Temperature : mean minimum temperature [for the year].