Topical Studies for Exodus 32:21:
Aaron {Forerunner Commentary}
Aaron {Nave's Topical Bible}
Moses {Forerunner Commentary}
Moses {Nave's Topical Bible}
On {Nave's Topical Bible}
Sin {Forerunner Commentary}
Sin {Nave's Topical Bible}
Sin {Torrey's Topical Textbook}
So {Nave's Topical Bible}