00511cam a2200181 4500 385785650 TxAuBib 20180702120000.0 190630s2019||||||||||||||||||||||||eng|u 59842 Project Gutenberg PGUSA eng TxAuBib Revelle, George. Operation Boomerang [Gutenberg] / George Revelle. Project Gutenberg, 2019. Public domain in the USA. Text. http://www.gutenberg.org/ebooks/59842 TXKNC