When researching this topic, you may find useful titles in other sections of its collection eg Human Rights (Internat 570) or legal philosophy Jurisprudence (Jurisp) or comparative studies (General).
Indeed you may well find that you need to visit other Bodleian Libraries too - such as the SSL Social Science Library and the RSL Radcliffe Science Library & the Philosophy Reading Rooms.
Subject search terms which could start you off searching our online catalogue SOLO
Economic development - environmental aspects
Public International Law Books are shelved on Level 3
Rights and Legal Personality for Water/Rivers
Victorian Environmental Water Holder (Australia - via legislation) (public entity created to hold water rights etc)
Whanganui (NZ - via legislation)
Ganges and Yamuna (India - State of Uttarakhand via court decision 2017)
Amazon Ecosystem (Colombia - Supreme Court: STC 4360-2018))