WHAT ARE THE CALCICHORDATA - AND THE LARGER QUESTION OF THE ORIGIN OF CHORDATES

[1] [Anonymous], 1969, PRINCIPLES COMP ANAT

[2] Ax, 1960, ENTDECKUNG NEUER ORG

[3] Berrill NJ, 1955, ORIGIN VERTEBRATES

[4] BJERRING HC, 1977, ZOOL SCR, V6, P127

[5] CASTER KE, 1956, J PALEONTOL, V30, P611

[6] CASTER KE, 1968, TREATISE INVERTEBR S, V1, P581

[7] CASTER KE, 1971, J PALEONTOL, V45, P919

[8] Clark R. B., 1964, DYNAMICS METAZOAN EV

[9] EATON T H, 1970, Journal of Paleontology, V44, P969

[10] EATON TH, 1970, J PALEONTOLOGY, V44, P168

[1] [Anonymous], 1969, PRINCIPLES COMP ANAT

[2] Ax, 1960, ENTDECKUNG NEUER ORG

[3] Berrill NJ, 1955, ORIGIN VERTEBRATES

[4] BJERRING HC, 1977, ZOOL SCR, V6, P127

[5] CASTER KE, 1956, J PALEONTOL, V30, P611

[6] CASTER KE, 1968, TREATISE INVERTEBR S, V1, P581

[7] CASTER KE, 1971, J PALEONTOL, V45, P919

[8] Clark R. B., 1964, DYNAMICS METAZOAN EV

[9] EATON T H, 1970, Journal of Paleontology, V44, P969

[10] EATON TH, 1970, J PALEONTOLOGY, V44, P168