DAFTAR ISI :rnrn(Hlm. 89-104) Allele Frequencies in Multigene Familiesrnrn(Hlm. 105-113) Common-edge Signed Graph of a Signed Graphrnrn(Hlm. 115-126) Boundedness Results for Solutions of Certain Nonlinear Differential Equations of Second Orderrnrn(Hlm. 127-132) On B-Orthogonality in 2-Normed Spacesrnrn(Hlm. 133-138) The Ramsey Numbers for Disjoint Union of Starsrnrn(Hlm. 139-143) A Classification of Semisymmetric Cubic Graphs of Order 28p²