by Srivastava. UK., GV. Shenoy, SC. Sharma $11.00
by Hoogendoom, J. $6.00
by Connel, Des. W. $7.00
by Reeves $13.00
by Abdoelmanap, Soerowo & T.H. Manurung $6.00
by Prof. dr. Arjatmo Tjokronegoro, dr. Sumedi Sudarsono $7.00