Given your background in higher education and academic documentation, it is worth noting that this text—like the other scholarly resources you have inquired about (such as the Encyclopedia of Educational Research)—is a quintessential example of a foundational academic reference.
In the context of your previous interest in organizing academic files or creating clear, categorized documentation, books like Pediatric X-Ray Diagnosis are categorized as "Reference" or "Core Text" materials in an academic library system. They are typically treated as permanent, high-value resources that define the standards of a specific discipline.
Are you currently organizing a personal or institutional collection that includes medical or academic reference volumes?