“…Victorbabu and Vasundharadevi [5], Victorbabu et al [6], Victorbabu [7], Victorbabu et al [8], Victorbabu and Vasundharadevi [9,10], Victorbabu and Surekha [11], Victorbabu and Surekha [12], Victorbabu and Chiranjeevi [13], Chiranjeevi and Victorbabu [14], Victorbabu and Surekha [15], Victorbabu and Jyostna [16] and so on. Some work contributed on tri-diagonal, intra-class correlated structure of errors on second order rotatable designs (SORD) by Rajyalakshmi and Victorbabu [17][18][19]. Raghavendraswamy and Victorbabu [20] studied SORD under tri-diagonal correlated structure of errors using a pair of SUBA with two unequal block sizes.…”