by Thomas A. N. S $6.00
by J. Guwandhi, SH. $7.00
by dr. Keneth Iyan, dkk. $9.00
by Pelezar. Michael J. & E.C.S. Chan $9.00
by Lachman, L., Herbert A. Lieberman & Joseph L. Kanig $18.00
by Joe H. Slate, Ph.D $13.00