I just went to a graph theory talk talking about various fractional graph parameters (but focusing on one). These were defined using linear programming. A question was asked, "How can we learn more about this technique." The answer given was, "There is not really a good resource for linear programming in combinatorics/graph theory." He said Schrijver (spelling?) has a book but you'd have to wade through a lot of stuff to get the stuff that is most important to graph theory/combinatorics.
So, do any of you know of good references that are specifically geared toward graph theory/combinatorics? It could be a book, chapter of a book, paper, whatever. Thanks for any help!