کتاب های Marcus Schaefer
![Engagement from Scratch!: How Super-Community Builders Create a Loyal Audience and How You Can Do the Same!](http://cdn.ketabkoo.com/covers/0/91459-n.jpg)
Engagement from Scratch!: How Super-Community Builders Create a Loyal Audience and How You Can Do the Same!
Danny Iny, C.C. Chapman, Mitch Joel, Natalie Sisson, Corbett Barr, Danny Brown, Brian Clark, Gini Dietrich, Dino Dogan, Evan Carmichael, Guy Kawasaki, Randy Komisar, Kristi Hines, Jeff Bullas, Sean Platt, Mark W. Schaefer, Marcus Sheridan, Adam Toren, Anita Campbell, 2011![Crossing Numbers of Graphs](http://cdn.ketabkoo.com/covers/11/1128256-n.jpg)
Crossing Numbers of Graphs
Marcus Schaefer, 2018![Crossing Numbers of Graphs (Discrete Mathematics and Its Applications)](http://cdn.ketabkoo.com/covers/13/1371698-n.jpg)