00507pamaa2200169 4500 0000023997 20060609090000.0 0072347465 651 WIE HF5718.3 WIE 2000 WIENBROER Rules of thumb : for business writers Diana Roberts Wienbroer, Elaine Hughes and Jay Silverman. New York: McGraw Hill, 2000. xiii, 223p.; 24cm. Commercial correspondence Hughes, Elaine Silverman, Jay