By Gladfelter, Irl A..
Springfield, Ill. C. C. Thomas 1975 .
xii, 193 p. 24 cm..
0398033234

By Warfel, George H..
Springfield, Ill. Thomas 1979 .
xii, 188 p. 24 cm..
0398038899

By Nash, Donald J..
Springfield, Ill. Thomas 1978 .
ix, 165 p. , Includes indexes. 24 cm..
0398037086

By Zavala, Albert,.
Springfield, Ill. Thomas 1972 .
xv, 331 p. 29 cm..

By Rivera, Miguel A..
[s. l.] [s.n.] 1980 .
vi, 47 p. 18 cm..