51.   Donors are the only other source of income.

52.   Foods and supplements are not the only source of iron.

53.   For many people, particularly elderly widows, it is virtually their only source of income.

54.   For some isolated people, the on-line link has been virtually the only source of information.

55.   For mutuals, the only source of capital beyond their earnings is borrowing.

56.   Foreign films are also no longer the only source of intimate and idiosyncratic art.

57.   For some, a grandmother or great-grandmother is the only source of strength and love.

58.   He goes on the run, with Sutton reluctantly serving as his only source of refuge.

59.   Helms is not the only source of Republican squirming.

60.   Her only source of income is the occasional signature afghan and baby blanket she sells.