By Hendrickson, James M..
New York Harcourt Brace Jovanovich 1979 .
xii, 180 p. 24 cm..
0155832514

By Labarca, Angela..
New York Holt, Rinehart and Winston 1983 .
xv, 431 p. , English and Spanish. | Includes index. 0030596068 (Student's ed.) | 0030628539 (Instructor's ed.)