Need these old articles, please

[horto.vet]

Bistner S.I., Rubin LF. & Roberts S.R. 1971. A review of persistent pupillary membrane in Basenji dogs. Journal American Animal Hospital Association. 7:143-145.
Roberts S.R. 3. Bistner S.I. 1969. Persistent pupillary membrane and associated defects in the Basenji. Veterinary Record. 85:242-244
Strande A., Nicolaissen B. & Bjerkas I. 1988. Persistent pupillary membrane and congenital cataract in a litter o English Cocker Spaniels. Journal Small Animal Practice. 29: 257.
:raisehat:

 

[Fabio13]

No.1 and No.2 are not available online

No.3:

http://www.mediafire.com/?kzwwzciztwq