"Islamic Empire / Geology." . . "Geology Islamic Empire History." . . "Geology / Islamic Empire / History." . "Islamic Empire." . . . . "Geologie." . . "Geschichte." . . . . . "<>"@ar . . . . "al-'Arab wa'ulūm al-arḍ" . . . . . "العرب وعلوم الأرض" . . "العرب وعلوم الارض" . . . . "al-'Arab wa-'ulūm al-arḍ" . . . "History" . . "History"@en . . . . "Arabs and Geology"@en . "al-'Arab wa-'ulum al-ard" . . "al-ʻArab wa-ʻulum al-ard"@en . . "Geology." . . "Kalifenreich." . .