Mimeograph manuals, stapled, 8x10", yellow paper covers. Titles are: Air Service Supply (15pp), Squadron Officers (11pp), Signal Communication (28pp), and Engineering (32pp). Some manuals have diagrams and drawings. Three have "Cadet B.C. Moore" in ink on the cover. Condition is poor with some insect damage and staining. Nevertheless, the contents are all readable and intact. Even in this condition the set is quite rare; not many of these manuals would have survived because of the poor paper quality and general disposeable nature of the publication. A wealth of information here.