This catalogue is an alphabetical listing of those printed works issued before 1861 which relate to agriculture in the continental United States and whcih are held in any of these institutions.

"Manual 60 has been issued as a supplement to Part 60 of the Civil Air Regulations. This manual deals with those secitons of Part 60 which pertain directly to air traffice control. It outlines, in easily understandable form, the procedures and phraseologies for both airport and airway traffic control. It should be understook that while procedures and phraseologies in this manual are not regulation in themselves, thay have been set up as recommended practices which will provide for safety in the operation of aircraft."--Title page verso