Biblio
“A Trip To The Summit Of Orizaba, The Altitudes Of Orizaba And Popocatepetl Effects Of High-Mountain Climbing”. Appalachia Vol. VIII (No. 4). Appalachia.
. 1898. Cogshall, WA, Douglass, AE_A Trip to the Summit of Orizaba, THe Altitudes of Orizaba and Popocatepetl Effects of High Mountain Climbing_1897.pdf (16.55 MB)