Karl Saben Twitchell

1885

• Keith Arnold in mining engineering
• al-Mamlakah al-ʻArabīyah al-Saʻūdīyah wa-taṭawwurāt maṣādiruhā al-ṭabīʻīyah
• Report of the United States agricultural mission to Saudi Arabia
• Saudi Arabia
• Saudi Arabia, with an account of the development of its natural resources