기타자료실에 3개의 자료가 업데이트 되었습니다.

http://www.kncold.or.kr/ds7_2.html

1) Dams of the United States_2013
A Pictorial Display of Landmark Dams
출처: USSD

2) Achievements and Advancements in U.S.Dam Engineering
edited by Douglas D. Boyer, Rechard L. Wiltshire, Glenn S. Tarbox

3) Development of Dam Engineering in the United States (1988)
Edited by Eric. B. Kollgaard and Wallace L. Chadwick