Deleted media articles from Wikipedia articles  

Dear Graemel,

There were some media articles that I posted on three articles. One of the articles, Cleaning Cards, I worte yesterday and included the articles as references that the products are used and approved by different people in different industries. The other Wikipedia articles were Slot Machines and Currency dectectors that the media articles covered more directly as they were about slots and bill acceptors. I'm not sure why they were deleted but would appreciate knowing so not to repeat the same errors.