By Friedman, Milton.
San Diego : Harcourt Brace Jovanovich, 1984 .
182 p. : il. ; 21,5 cm. , Bibliografía: p.169-171. 0151923795

By Simon, Leonard S.
New York : Harcourt, 1970 .
346 p. ; 24 cm.

By King, Edward J..
New York : Harcourt, 1973 .
254 p. 0155470418

By Armitage, P..
Madrid : Harcourt Brace, 1997 .
593 p. : 24 cm.
8481741582

By Brooks, Charles Franklin.
New York : Harcourt, Brace and Company, 1938 .
295 p. : 21 cm.

By Beebe, William.
New York : Harcourt, Brace and Company, 1934 .
344 p. : 23 cm.

By Zim, Herbert S..
New York : Harcourt, Brace and Company, 1943 .
369 p. : 20 cm.