id author title date pages extension mime words sentence flesch summary cache txt crl-11352 Rather, John Carson The U.S. Office of Education Statistics Survey 1960-08-31 5 .pdf application/pdf 5180 381 83 H e writes f u r t h e r : Now let's consider all the books of the world. T h e r e are many other collections, b u t duplications occur among them, so let us say that there are some twenty-four million books of interest in the world. cache/crl-11352.pdf txt/crl-11352.txt