Janitorial and maintenance examinations : : a study guide for civil service / [electronic resource] / by Harry Walter Koch.. — 2d ed.. — San Francisco : : Ken-Books,, c1975.. — 1 v. in various pagings : : ill. ; 28 cm. — (Ken Book self-study courses).



Subjects--Topical Terms:
Janitors--Examinations, questions, etc.
Civil service--Examinations.