This list does not pretend to be exhaustive. Its aim is to aid persons in the Bureau of Agricultural Economics who have to do with the preparation of manuscripts to find answers to questions regarding proper usage. The books have been classified with this end in view. It will readily be seen that many of the books might have been included under more than one heading. They have been put where it was thought they would be of the most value. It should be kept in mind that the more specific subjects, such as punctuation and proofreading, are also treated in the general books listed under English Composition and Style Books.