id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cjel-5555	Saideman, Ellen M.	An Overview of the Bubble Concept	2020	24	.pdf	application/pdf	10905	723	67	V. PRACTICAL OBSTACLES TO BUBBLE USE In addition to questions surrounding the legality of the bubble concept, many practical obstacles block its widespread use. Bubble to Clean Air at Less Cost, 202 ENGI- NEERING NEwS-REc.	cache/cjel-5555.pdf	txt/cjel-5555.txt