Subjects: mining (sorted by popularity)
- Mining engineering 256 downloads
- Great Britain. Army. Royal Sappers and Miners 232 downloads
- Gold mines and mining -- Australia 214 downloads
- Silver mines and mining -- Fiction 211 downloads
- Mineral industries 200 downloads
- Gold mines and mining -- Alaska -- Juvenile fiction 187 downloads
- Coal mines and mining -- United States -- Fiction 183 downloads
- Coal miners -- United States -- Fiction 183 downloads
- Mining engineers -- Fiction 155 downloads
- Coal miners -- England -- Juvenile fiction 151 downloads
- Coal mines and mining -- Great Britain -- Juvenile fiction 151 downloads
- Mineralogy -- Illinois 140 downloads
- Mines and mineral resources -- Colorado -- Fiction 136 downloads
- Gold mines and mining -- Ghana 135 downloads
- Gold mines and mining -- British Columbia 132 downloads
- Gold mines and mining -- Alaska 132 downloads
- Diamond mines and mining -- Juvenile fiction 124 downloads
- Gold mines and mining -- Australia -- Fiction 115 downloads
- Gold miners -- Canada, Western -- Fiction 107 downloads
- Mines and mineral resources -- California, Southern 104 downloads
- Mineral industries -- Australia -- Fiction 100 downloads
- Gold mines and mining -- Yukon River Valley (Yukon and Alaska) -- Fiction 100 downloads
- Gold mines and mining -- Brazil 98 downloads
- Coal mines and mining -- Safety measures 96 downloads
- Opal mines and mining -- Australia -- Fiction 95 downloads