Text-book of the embryology of invertebrates / by Dr. E. Korschelt [and] Dr. K. Heider. Tr. from the German.

pt. 4

Text-book of the embryology of invertebrates / by Dr. E. Korschelt [and] Dr. K. Heider. Tr. from the German.

pt. 1

Distribution and abundance of fishes and invertebrates in Gulf of Mexico estuaries / project team, David M. Nelson (editor) ... [et al.].

1

Proceedings of the third USA-USSR symposium on the effects of pollutants upon aquatic ecosystems.

3rd.

Proceedings of the third USA-USSR symposium on the effects of pollutants upon aquatic ecosystems.

1st & 2nd

Distribution and abundance of fishes and invertebrates in Gulf of Mexico estuaries / project team, David M. Nelson (editor) ... [et al.].

2

Text-book of the embryology of invertebrates / by Dr. E. Korschelt [and] Dr. K. Heider. Tr. from the German.

pt. 3

Text-book of the embryology of invertebrates / by Dr. E. Korschelt [and] Dr. K. Heider. Tr. from the German.

pt. 2

Pennsylvanian invertebrates of the Mazon Creek Area, Illinois: the morphology and affinities of Tullimonstrum / Ralph Gordon Johnson -- and Eugene S. Richardson, Jr. --

v.12:no.8(1969)