File:Loeschdecke.jpg - Wikimedia Commons

Das Owned-Spiel [Archiv]

File:L-Eisendecken5.png - Wikimedia Commons

View of the Scottish Square — Dumbarton Oaks

Das Owned-Spiel [Archiv]

Leidheuser Office and Home

Soil Data Explorer California Soil Resource Lab

225 Ludolf Images: PICRYL - Public Domain Media Search Engine Public Domain Search

Loess hi-res stock photography and images - Alamy

Loess soil hi-res stock photography and images - Alamy

File:Huitlacoche 1929.jpg - Wikimedia Commons

Encyclopaedic Resistance: Blake, Rees's Cyclopædia, and the Laocoön Separate Plate, Rosamund A. Paice, Blake/An Illustrated Quarterly

File:Scheck.JPG - Wikimedia Commons

Loess soil hi-res stock photography and images - Alamy