The Verapaz in the sixteenth and seventeenth centuriesKarl Sapper · First published 1985Open the Tome
Das Element der Wirklichkeit und die Welt der ErfahrungKarl Sapper · First published 1924Open the Tome
Natur und Lebensbedingungen in Tropischen und Tropennahen GebietenKarl Sapper · First published 1920Open the Tome
The old Indian settlements and architectural structures in Northern Central AmericaKarl Sapper · First published 1896Open the Tome
