一般注記Annual
Dates of publication and/or sequential designation: Ceased with 1999 issue
Description based on: 1990
Physical description for original version: v. : 28 cm
原資料等に関する注記原資料の出版事項: Washington, D.C. : U.S. Dept. of the Interior, National Park Service
Continued by: Annual report (Microfiche) (Natural Resource Program Center (U.S.) . Water Resources Division.)
SUPTDOC番号: I 29.2: W 29/2
GPO管理番号: 0646-R (MF)