A contribution to the embryology and phylogeny of the pycnogonids ... Morgan, Thomas Hunt, 1866-1945 creator text book [Baltimore] 1890 1890
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ENG Life. Required copy (manuscript). "A preliminary note on the embryology of the pycnogonids. By T. H. Morgan.": l. 3-7. Thesis (Ph.D.)--Johns Hopkins University, 1890. Pycnogonida https://www.biodiversitylibrary.org/bibliography/28283 10.5962/bhl.title.28283 MdBJ