Apologist James White has a great radio program available covering Romans 9 in defense of Calvinism: Radio Free Geneva.
If you have any doubt that a calvinistic understanding of Romans 9 is valid, check it out.
And if you simply love God’s Word enough to have your calvinistic faith reaffirmed, check it out.
I wish I could listen to his Dividing Lines, but my computer doesn’t have sound. O cruel Fate! ;)