1.
2.
3.
4.
Sao Paulo : Revista Dos Tribunais, 1977.
Portuguese | N 742 BIT.D |
5.
Bern [Switzerland] : Staempfli, 1979.
German | N 742 LAN.L |
6.
London : Council for Educational Technology for the United Kingdom, 1976.
English | N 742 CRA.C |
7.
8.
9.
10.