In early 1975, Film Comment magazine devoted an entire, oversize issue to Hollywood cartoons. It's well worth finding in a library or through an online service, as it contains a comprehensive interview with Chuck Jones as well as an interview with Grim Natwick and articles by Greg Ford and Mark Langer.
One piece was an essay on Walt Disney by film critic Jonathan Rosenbaum. Rosenbaum has now posted the first part of that essay on his website with the second part to follow shortly. As Thad has pointed out in the comments, part 2 is now up.
And here is Rosenbaum on Tex Avery.