Vol. s3-7, Issue 41, 1874May 01, 1874 EDT
On Helderberg Rocks in New Hampshire
On Helderberg Rocks in New Hampshire
Charles Henry Hitchcock,
Hitchcock, C. H. (1874). On Helderberg rocks in New Hampshire. American Journal of Science, s3-7(41), 468–476. https://doi.org/10.2475/ajs.s3-7.41.468