learn to play bass guitar online

Walking the Bass Guitar Books?
I play bass in the orchestra and jazz band, and I need to learn how to play a bass line walking (for jazz band), I was going to get a book, but also online sites might be useful too. I do not know if this means something, but in my music there are letters slightly above the slashes in bars like G major 7th or something like that. I greatly appreciate any contribution that you have. Thank you
The symbols that you see above or in the moat are the chord symbols are: Cmaj7, D-7 (d minor 7th) G7 (G dominant 7th). At this stage it seems that you need to find a teacher of theory, but check out "Chords and Progressions" by Bugs Bower-pub by Chas. Colin. Also check any books by Rufus Reid, Ray Brown, Eddie Gomez, or talk to Dave Santoro The Hartford (Ct.) Academy of the Arts .. maybe Online?
How to Play the Bass Guitar : Basic Slapping Techniques for Bass Guitar
