search materials(including e-books and e-journals) held by Hokkaido university.
search materials held by universities in Japan.
search information on academic articles published in Japan.
search NDL(National Diet Library) online, NDL Digitized Contents and "Aozora Bunko", materials of a Japanese digital library.
Search keyword：(Standard classification: 333.95/16/094)
Code of practice for the conservation of threatened animals and plants and other species of international significance : as adopted by the senior advisers to ECE governments on environmental and water problems at their fifth session in March 1992 / Economic Commission for Europe, Geneva
New York : United Nations , 1992
Conserving Europe's natural heritage : towards a European ecological network / edited by Graham Bennett
London ; Boston : Graham & Trotman : Martinus Nijhoff , 1994
(International environmental law and policy series)