71.   Several factors are contributing to this change.

72.   Several factors contribute to the exodus to other districts.

73.   Several factors contribute to the shortage of organs.

74.   Several factors contributed to that decline in productivity.

75.   Several factors contributed to the margin.

76.   Several factors have contributed to these changes.

77.   Some analysts say that other factors could have contributed to the drop in the stock price.

78.   Some environmental factors may contribute to the problem, Aragon said.

79.   Still, other factors also contributed to the drop, analysts said.

80.   The administrator said several factors contributed to the academic problems of last spring.