License for the docs?

[Mikhail Ramendik]

Hello,

Is there a uniform license under which the docs from the FreeBSD
Documentation Project are available? If not, how can I find out for a
particular document?

Here's my problem... I'm compiling a book about Free / Open Source
Software, in Russian. For those who read Russian, the current version of
the contents is available at http://ramendik.ru/freebook . The book will
be freely redistributable.

I would like to include "Explaining BSD" by Greg Lehey, in a Russian
translation that is already available.

However, I am not sure I am allowed to do this. How do I find out?

Sincerely yours, Mikhail Ramendik
Moscow, Russia