There are more than 650 guides. NewLib J87 N6 X311.42. Circulars provide practical information similar to guides but are often more comprehensive. New Mexico State University. NewLib J87 N6 X309.45.
Bulletins are the results of major completed research projects.
They can be individually searched by author, title, or subject. Research Report . Research reports are the result of ongoing research. They are somewhat less complete than bulletins, though both are scholarly publications. These too can be individually searched by author, title, subject, or call number.