Mizzi Langer -- first advertised rock climbing pitons (Mauerhaken)
First carabiners for climbing-summary. - by John Middendorf
First carabiners for climbing-summary. - by John Middendorf
1930s Climbing Tools (Europe, PartC) - by John Middendorf
Take a Walk to the Wild Side Notizbuch : A5 KALENDER 2020 Wandern Geschenke - Gipfelbuch - Tagebuch zum Eintragen - Wanderzubehör - Berg Tourenbuch - Wanderbuch - Bergsteiger Wanderer (Paperback) - Walmart.com
1930s Climbing Tools (Europe, PartC) - by John Middendorf