00599cam a2200181 4500 438138357 TxAuBib 20190925120000.0 200807s2020||||||||||||||||||||||||eng|u 62871 Project Gutenberg PGUSA eng TxAuBib Mantell, Gideon Algernon, 1790-1852. Thoughts on a Pebble, or, A First Lesson in Geology [Gutenberg] / Gideon Algernon Mantell. Project Gutenberg, 2020. Public domain in the USA. Text. Geology -- Juvenile literature. http://www.gutenberg.org/ebooks/62871