I am having trouble finding sources on the seven ancient wonders of the world.
Go to the link below for EBSCO: All History Databases. Copy and paste this search: DE "SEVEN Wonders of the World".
That is a subject search for Seven Wonders of the World. Once you run the search, check the Full Text box on the left. You can use the subject limiters on the left to reduce down the results.\
If you would like eBooks, you can go to the EBSCO eBook link below and search "seven wonders of the world". Use the quotes.
Once you have your results, click to expand the Category limiter on the left and check the subjects you want to include.