TY  - RPRT
TI  - Elkton-Wilmington folio, Maryland-Delaware-New Jersey-Pennsylvania
AU  - Florence Bascom
AU  - Benjamin LeRoy Miller
PY  - 1920
DO  - 10.3133/gf211
UR  - https://pubs.usgs.gov/publication/gf211
ID  - gf211
ER  -