== Bibliography ==*"Through Kamchatka by Dog-Sled and Skis" by Sten Bergman (Seeley, Service & Co., Ltd., 1927), ISBN 978-1-135-48149-0.
*"Through Kamchatka by Dog-Sled and Skis" by Sten Bergman (Seeley, Service & Co., Ltd., 1927), ISBN 978-1-135-48149-0.