Music movie soundtrack to Dillinger is Dead (Dillinger è Morto)?

There isn't much dialog in Marco Ferreri 's 1968 film Dillinger Is Dead (Italian: Dillinger è Morto) but there is a lot of good music played quitely in the background by the actors turning on TVs, radios or record players. Neither the orginal film or the Criterion DVD credits anyone other than Teo Usuelli.

I've figured out some song but, the good ones remain a mystery. Does anyone know who the artists were?:

01 - Teo Usuelli(?) - credits [wordless a capella like Burt Bacharach]
02 - Jimmy Fontana - Cielo Rosso (Red Sky)
03 - Patty Pravo - Qui e La (Here And There)
04 - ? - In Italian translated as "I recorded your voice on two tape recorders that play continuously so that your voice is always here"
05 - ? - "Lone gun where do you wander tonight?" [spoken and sung in English [Western style]. Similar to "Ballad of the Green Berets"]
06 - The Four Kents - Trav'lin' Man [Stevie Wonder cover]
07 - The Four Kents - The Moving Finger Writes [Len Barry cover]
08 - The Four Kents - Searchin' For My Baby [not the Leiber/Stoller song]
09 - Dino(?) - Italian pop song
10 - Teo Usuelli(?) - march. bike race on TV
11 - Teo Usuelli(?) - sitar instrumental on TV
12 - ? - vocal samba 1 & 2 sung in Spanish or Portuguese
13 - ? - another samba 3
14 - ? - classical flute & piano pieces
15 - Teo Usuelli(?) - spooky instrumental
16 - The Rokes - Hold My Hand
17 - The Rokes - Ripe Apples
18 - ? - guitar instrumental with funny organ [similar to Shadows] on radio
19 - Teo Usuelli(?) - spooky instrumental reprise
20 - ? - samba reprise then whirly stick noises