By Easton, David,.
Buenos Aires Amorrortu editores 1969 .
233 p.

By Easton, David,.
Buenos Aires Amorrortu editores 1969 .
187 p. 20 cm..

By Easton, David,.
New York Wiley 1965 .
xvi, 507 p. 24 cm..

By Easton, David,.
Englewood Cliffs, N.J. Prentice-Hall 1966 .
vi, 154 p. , 920618

By Easton, David,.
New York McGraw-Hill 1969 .
xvi, 440 p. , 920622

By Easton, David,.
New York Knopf 1971 .
xx, 377, x p. , 920622 21 cm..
0394315367

By Easton, David,.
Englewood Cliffs, N.J. Prentice-Hall 1965 .
xvi, 143 p. , 920622 24 cm..