Ernest de Koven Leffingwell books & textbook
Conquering the Arctic Ice
Mikkelsen, Ejnar Howe, George Plummer Leffingwell, Ernest De Koven
Legare Street Press /2022-10-27 Paperback / 494 Pages
isbn-10: 1015895506 / isbn-13: 9781015895508
The Canning River Region, Northern Alaska, Issues 109-110
Legare Street Press /2022-10-27 Hardcover / 312 Pages
isbn-10: 1017265844 / isbn-13: 9781017265842
