Several different granny square joining tutorials....good site!
Crochet - Techniques
Crochet How to Join Granny Squares - Photo Tutorial ❥ 4U // hf
Knot Your Nana's Crochet: 10. Different Way's To Join Granny Squares
granny square tutorial part 3: joining squares of the same size
Crochet Patterns and Projects
Kindra's Crochet Corner-to-Corner C2C Navy, Gray (Grey Mist) and White baby blanket with scalloped edge Pattern Tutorial
Crochet Seams - Need this for attaching the granny squares I've been piling up
Knot Your Nana's Crochet: 10. Different Way's To Join Granny Squares. So going to try this!
stitch by stitch
Instructions Sweet Granny
3 Inch Solid Granny Square - Free Crochet Pattern by EyeLoveKnots for The Stitchin' Mommy | http://www.thestitchinmommy.com
The WHOot Best Crochet and Knitting
Joining granny squares