Topical Studies for Genesis 4:2:
Abel {Forerunner Commentary}
Abel {Nave's Topical Bible}
Brother {Nave's Topical Bible}
Cain {Forerunner Commentary}
Cain {Nave's Topical Bible}
Ground {Nave's Topical Bible}
Sheep {Forerunner Commentary}
Sheep {Nave's Topical Bible}
Sheep {Torrey's Topical Textbook}