Pycnogonids
Hedgpeth, J.W.; Haderlie, E.C. (1980). Pycnogonids, in: Morris, R.H. et al. (Ed.) Intertidal invertebrates of California. pp. 636-640
In: Morris, R.H.; Abbott, D.P.; Haderlie, E.C. (Ed.) (1980). Intertidal invertebrates of California. Stanford University Press: Stanford. ISBN 0-8047-1045-7. , meer
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