Divided we govern : party control, lawmaking, and investigations, 1946-1990 / David R. Mayhew. Mayhew, David R. Political parties United States. JK2261 .M36 1991 328.73077 20 MAD Includes bibliographical references (p. 201-213) and index. New Haven : Yale University Press, c1991. c1991. 1991 Text viii, 228 p. ; eng United States.