FACTORS AFFECTING EFFICACY AND IMMUNOLOGICAL RESPONSE OF PESTE DES PETITS RUMINANTS (PPR ) VACCI NES IN SMALL RUMINANTS - Khan; S. B.; U. Sadique; F. A. Khan; I. Ahmad; Z. U. Rehman; M. A. Khan; M. Idrees; Z. Shah (Journal of Animal and Plant Sciences, 2013)