Template:Häntzschel, 1966
- Häntzschel, W. 1966. Recent contributions to knowledge of trace fossils and problematica. Pp. 10–17. In: Rhodes, F.H.T., Häntzschel, W., Müller, K.J., Fisher, D.W. & Teichert, C. Treatise on Invertebrate Paleontology, Part W, conodonts, conoidal shells, worms, trace fossils: comments and additions. University of Kansas Paleontological Contributions. Paper 9: 18 pp, 21 figs. hdl: 1808/3756
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