Players can use any of the reference material to find the necessary information.
The studies have continued to be used as reference material into the 21st Century.
The first step is doing the research and getting the reference materials I need.
I know the reference material has been sitting there for some time.
"Many of the kids around here need it for reference material," he said.
These are used as the main reference material for the final painting.
It is still widely read and used as reference material for the period.
She also tried to maintain information on current events and reference materials.
Professional reference material in schools is given a low priority.