Several statistical offices publish productivity accounting handbooks and manuals with detailed accounting instructions and definitions. It prepares programs, syllabi, and pedagogical materials such as handbooks and laboratory manuals. It also publishes a number of handbooks and research monographs. By the 1930s Deming's table was appearing in handbooks and encyclopedias of chemistry. Such patterns were incorporated into dictionaries and handbooks for students. Emissivity measurements for many surfaces are compiled in many handbooks and texts. These are found in engineering handbooks and manufacturer's literature. Black countered by mailing literature to student addresses obtained from school handbooks. Related documents, such as defense handbooks and defense specifications, are also addressed. Books and user handbooks were introduced. This version of the legend has been printed in numerous BSA handbooks and magazines. Accordingly, many companies have formal policies in their employee handbooks against gossip. It was published by Penguin Books in the Penguin Handbooks series. Two main sources are collective agreements and company handbooks. German intelligence set out to provide their invading forces with encyclopaedic handbooks giving useful information.