A forest of the coal age / by B. E. Dahlgren, Acting Curator, Dept. of Botany.

no.14(1933)

Annual report of the Director to the Board of Trustees for the year ... / Field Museum of Natural History

9, no. 2

Annual report of the Director to the Board of Trustees for the year ... / Field Museum of Natural History

10, no. 2

Annual report of the Director to the Board of Trustees for the year ... / Field Museum of Natural History

5, no. 6

Annual report of the Director to the Board of Trustees for the year ... / Field Museum of Natural History

6, no. 1

Annual report of the Director to the Board of Trustees for the year ... / Field Museum of Natural History

3, no. 2

Annual report of the Director to the Board of Trustees for the year ... / Field Museum of Natural History

7, no. 3

Annual report of the Director to the Board of Trustees for the year ... / Field Museum of Natural History

3, no. 4

Annual report of the Director to the Board of Trustees for the year ... / Field Columbian Museum.

2, no. 4

Annual report of the Director to the Board of Trustees for the year ... / Field Museum of Natural History

11, no. 1

Annual report of the Director to the Board of Trustees for the year ... / Field Columbian Museum.

1, no. 5

Annual report of the Director to the Board of Trustees for the year ... / Field Museum of Natural History

4, no. 2

Annual report of the Director to the Board of Trustees for the year ... / Field Museum of Natural History

5, no. 5

Annual report of the Director to the Board of Trustees for the year ... / Field Columbian Museum.

2, no. 2

Report of the Director to the Board of Trustees for the year ... / Chicago Natural History Museum.

1962