Dietz et al., 1999
From dinoflaj2
Dietz, L.F., Sarjeant, W.A.S. and Mitchell, T.A., 1999: The dreamer and the pragmatist: a joint biography of Walter Wetzel and Otto Wetzel, with a survey of their contributions to geology and micropaleontology. Earth Sciences History, v.18, no.1, p.4-50.
