User:EBCarleton/Gravel pit/Bibliography

You will be compiling your bibliography and creating an outline of the changes you will make in this sandbox.

Outline of proposed changes
Adding a description of gravel pits:


 * What they produce
 * General physical characteristics
 * Where they are located

Adding a description of gravel pit products:


 * Aggregates, concrete
 * What the produced materials are used for

Significance:


 * Why gravel pits are important, specifically to isolated populations
 * Road infrastructure, jobs in remote locations