Unknown library funk from 70's

[Ross]

Hello. Can someone help me to identify this library-funk tracks plase.

1)  http://youtu.be/seQu4FuFD4o
2)  http://youtu.be/FdGid7rzqH4
3)  http://youtu.be/ZA-TAR4s-48
4)  http://youtu.be/z7vKsYCyvno
5)  http://youtu.be/bTwAl05CwaA
6)  http://youtu.be/CCVUIZ8Ty_U

[Ross]

Still looking for your kind help:)

[Derker]

I don't know any of them, but... Hell, 2nd and 4th song hitted hard! I'd love to know what are the names of them!
Could you tell something more about where did you get them from?

[Ross]

About 10 years ago I cut this tracks out from some mix, downloaded from soundcloud or mixcloud and saved this clips to my laptop.
But unfortunately that is all I can say about origin of this tracks because so much time has passed:(