Problem with share directory

[Franca Vercellone]

Hello,
I have some problem sharing directory in this way.
I'd like that  the same directory is seen from anybody only for reading and
3 users could write.
I have samba version 1.9.18p10 and the smb.conf  is write down .How I can
do this ?
Thank's
Franca
(See attached file: smb.conf)

e.mail: vercellone at csi.it
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