The book may have numerous typos or missing text. It is not illustrated or indexed. However, purchasers can download a free scanned copy of the original rare book from the publisher's website. You can also preview the book there. Purchasers are also entitled to a trial membership in the publisher's book club where they can select from more than a million books for free. Publication date: 1920 Subjects: Sociology; Social Science / Anthropology / General; Social Science / Anthropology / Cultural; Social Science / Methodology; Social Science / Research; Social Science / Sociology / General