Check out this journal article by Louise Sweet in a 1965 issue of the “American Anthropologist” on “Camel Raiding of North Arabian Bedouin: A Mechanism of Ecological Adaptation”. The entire article is available for viewing free of charge.
Somehow I missed this 6 years old article on the Shammar of Iraq in French weekly Paris-Match newspaper, which is translated into English here. I wish I could find the original, so I can see the photos, especially that one: [PHOTO CAPTION (page 74): Proud of belonging to a dynasty of glorious horsemen, Sheikh Abdullah shows us a purebred Arab, one of the twenty horses in his personal stud farm.]