Holt Biology Laboratory Manager's Professional Reference Holt McDougal Earth Science Softcover teachers' reference that explains risk management, the hazards that can occur in classroom laboratories and solutions teachers can implement. Grades: 9-12 Material Type: Resource Materials Format: Softcover, 168 Pages ISBN-13/EAN: 9780030649219 ISBN-10: 0030649218 Product Code: 1084357 National/State: National Copyright Year: 2010