ppa - Downgrading libreoffice from repository

I am trying to downgrade from libreoffice 4.3.0~rc1 to the most recent stable 4.2.0.

This is on account of this bug .

I have seen this question about How to downgrade to a specific ppa version of libreoffice which suggests

sudo apt-get install libreoffice=version

but I can't figure out how to specify the version.

libreoffice=4-2 or libreoffice=4.2 or libreoffice=4.2.0 all give me variations on

E: Version '4-2' for 'libreoffice was not found

I have also tried

sudo ppa-purge ppa:libreoffice/ppa
sudo add-apt repository ppa:libreoffice/libreoffice-4-2
sudo apt-get update
sudo apt-get install libreoffice

but that also gives me the new, unworking 4.3 version.

Any suggestions? I suppose I could install from the .deb files, but I'd rather use a repository version if possible.

Note that:

apt-cache policy libreoffice
libreoffice:
  Installed: 1:4.3.0~rc1-0ubuntu1~precise0.2
  Candidate: 1:4.3.0~rc1-0ubuntu1~precise0.2
  Version table:
 *** 1:4.3.0~rc1-0ubuntu1~precise0.2 0
        500 http://ppa.launchpad.net/libreoffice/libreoffice-prereleases/ubuntu/ precise/main amd64 Packages
        100 /var/lib/dpkg/status
     1:3.5.7-0ubuntu6.1 0
        500 http://us.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
     1:3.5.4-0ubuntu1.1 0
        500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages
     1:3.5.2-2ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
but "sudo apt-get install libreoffice=1:3.5.7-0ubuntu6.1.0"
returns
"E: Version '1:3.5.7-0ubuntu6.1.0' for 'libreoffice' was not found"