This version is VERY accurate.  The chords are for open guitar, standard tuning.
It's the same chords as the original just not played on
fifth fret, so if you play with the recording it's the exact same thing.
The only part that is different is the Fminor which isn't
played in the original version.  If you don't perfer the Fm,
than play F right through it until the C.
When the verses star each chord gets a measure each,
and when it gets to the "What a wonderul world" part,
every two chords is a measure.  If you listen to the original
you'll have to listen to the little transition he does between
the F and F9 on the "and I think to myself" part.
If you can't figure out the hammer on just play F and F9 
straight into the G. Enjoi

C - (332010)
Calt - (x32013)
CMaj7 - (332000)
Am - (x02210)
F - (x03211)
G - (320003)
F9 - (x03213)
F9* - (x03013)
Em - (022000)
E7 -(020130)
Fm - (x33111)
FMaj7 - (x03210)
Dm7 - (x00211
C2 - (x32030)(optional to end the Humming outro)

Guitar solo intro:
|C, CMaj7|Am, F|C, G|Am, F9*|F|

Humming Intro:
|C|Em|F|C|F|E7|Am|F|


C         Em               F       C
Somewhere over the rainbow, way up high;
F   Fm  C                          G          Am       FMaj7(or F)
and the dreams that you dreamed of, once in a lullaby.
C         Em               F           C
Somewhere over the rainbow, blue birds fly;
F   Fm  C                          G                      Am   FMaj7
and the dreams that you dreamed of, dreams really do come true.
Calt                           G                                Am     F
Someday I'll wish upon a star, wake up where the clouds are far behind me.
Calt                                  G
Where trouble melts like lemon drops, high above the chimney tops,
Am                 F
that's were you'll find me. Oh,
C         Em               F           C
Somewhere over the rainbow, blue birds fly;
F   Fm  C                       G                    Am   F
and the dreams that you dare to, oh why, oh why can't I?
C                   Em     F              C
Well I see trees of green, and red roses too,
F               C       E7       Am
I'll watch them bloom for me and you.
F                 F9    F  G               Am       F
And I think to myself:     What a wonderul world.
C                   Em          F             C
Well I see skies of blue, and I see clouds of white,
F                     C   E7          Am
and the brightness of day; I like the dark.
F                F9      F   G                 C     F    C
And I think to myself:       What a wonderful world.
G                 Calt     G                Calt
The colors of the rainbow, so pretty in the sky,
G               Calt     G              Calt    
Are also on the faces of people passing by.
F                   C      F                 C
See friends shaking hands, saying "how do ya do?"
F              C       Dm7         G
They're really saying, "I...I love you"
C             Em      F                C
I hear babies crying, and I watch them grow,
F             C         E7         Am
they'll learn much more than we'll know.
F                F9      F   G                Am      F
And I think to myself:       What a wonderful world.
Calt                           G                                Am     F
Someday I'll wish upon a star, wake up where the clouds are far behind me.
Calt                                  G
Where trouble melts like lemon drops, high above the chimney tops,
Am                 F
that's were you'll find me. Oh,
C         Em               F           C
Somewhere over the rainbow, blue birds fly;
F   Fm  C                       G                    Am   F
and the dreams that you dare to, oh why, oh why can't I?

Humming outro:
|C|Em|F|C|F|E7|Am|F|C2|