id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
assc-56578	Gao, Zhiyan	Shaping the Wild: A Case Study of the Sierra Club’s Impact on American National Parks	2025	13	.pdf	application/pdf	5907	265	33	Keywords Sierra Club, environmental conservation, environmental non-governmental organizations (ENGOs), national park movement, environmental history, environmental advocacy 1. This paper investigates the multifaceted roles and enduring impact of the Sierra Club within the American national park movement.	cache/assc-56578.pdf	txt/assc-56578.txt