A second important source of changes in cash flow is borrowing or paying back money. (sciencemag.org)
Students who take the places of departing students represent another potentially important source of changes in a school's overall enrollment. (educationnext.org)
If the loss of heat by the oceans is caused by a change in radiation balance, the primary source of the change should be a change in (mainly tropical) cloud cover. (realclimate.org)