http://book.klll.cc/ebooks/subject/16302.opds 2025-08-04T00:03:11Z Books about Supply and demand (sorted by popularity) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-08-04T00:03:11Z https://book.klll.cc/ebooks/10612.opds Supply and Demand Sir Hubert Douglas Henderson