Colinvaux, Paul.1978. Why Big Fierce Animals are Rare: An Ecologist's Perspective . Princeton, NJ: Princeton University Press.
2.
Eldredge, Niles, and Marjorie Grene.1992. Interactions: The Biological Context of Social Systems . New York: Columbia University Press.
3.
Gray, Virginia, and David Lowery.1992. "Corporatism Without Labor? Industrial Policymaking in the American States." Journal of Public Policy2: 315-29.
4.
_ . 1993. "Stability and Change in State Interest Group Systems: 1975 to 1990." State and Local Government Review25: 87-96.
5.
_ . 1995. "The Demography of Interest Organization Communities: Institutions, Associations, and Membership Groups." American Political Quarterly23: 3-32.
6.
Hannan, Michael T., and Glenn R. Carroll .1992. Dynamics of Organizational Populations. New York: Oxford University Press.
7.
Hannan, Michael T., and John Freeman.1989. Organizational Ecology. Cambridge, MA: Harvard University Press.
8.
Hunter, Kennith G., Laura Ann Wilson, and Gregory G. Brunk .1991. "Social Complexity and Interest Group Lobbying in the American States." Journal of Politics53: 488-503.
9.
Hutchinson, G.E.1959. "Homage to Santa Rosalia; or, Why Are There So Many Kinds of Animals?" The American Naturalist93: 145-59.
10.
Lack, David.1954. The Natural Regulation of Animal Numbers. Oxford: Oxford University Press.
11.
Lowery, David, and Virginia Gray.1994. "Do Lobbying Regulations Influence Lobbying Registrations? " Social Science Quarterly7: 382-84.
12.
_ . 1995. "The Population Ecology of Gucci Gulch, or the Natural Regulation of Interest Group Numbers." American Journal of Political Science39: 1-29.
13.
Morehouse, Sarah McCally.1981. State Politics, Parties, and Policy. New York: Holt, Rinehart, and Winston.
14.
Olson, Mancur, Jr. 1965. The Logic of Collective Action. Cambridge, MA: Harvard University Press.
15.
_ . 1982. The Rise and Decline of NationsNew Haven: Yale University Press.
16.
Schattschneider, E.E.1960. The Semisovereign People. New York : Holt, Rinehard, and Winston.
17.
Schlozman, Kay Lehman, and John T. Tierney .1986. Organized Interests and American Democracy. New York: Harper & Row.
18.
Truman, David.1951. The Governmental Process. New York : Knopf.
19.
Walker, Jack L., Jr. 1991. Mobilizing Interest Groups in America: Patrons, Professionals, and Social Movements. Ann Arbor: University of Michigan Press.
20.
Wilson, Edward O.1992. The Diversity of Life. Cambridge, MA : Harvard University Press.
21.
Yanarella, Ernest J., and William C. Green .1990. The Politics of Industrial Recruitment: Japanese Automobile Investment and Economic Development in the American States. New York: Greenwood Press.