Google it. They all have web sites. You might want to start with the Junior Mining section, which really do go into what they do.
I'll get you started with a couple.
Try GRR on the venture exchange in fact all of these are on the venture. ATC on the venture.
Look at Apple's website under "shareholder services."
Eg. I want to know AAPL apple inc's stock split information including date, price. Which website has this information?
