1681
Published: 1902
Superior document: University of Toronto studies : Biological series 2
1682
1683
1684
1685
Published: 1947
Superior document: Circular / California Agricultural Extension Service 116
1686
1687
Published: 1927
Superior document: Bulletin / Agricultural Experiment Station / University of California, Division of Agricultural Sciences 442
1688
Published: 1923
Superior document: Studies of Class B stellar spectra containing emission lines 5
1689
1690
Published: 1989
Superior document: Transactions of the American Philosophical Society 79,2
1691
1692
Published: 1935
Superior document: Bell telephone system B-852
1693
1694
Published: 1978
Superior document: Spoken Urdu a beginning course [1]
1695
1696
Published: 1970
Superior document: Enthalten in Berichte, Besprechungen [Kevelaer, Rhld.], 1970 S.476 - 477
1697
Published: 1991
Superior document: PDOD paper / Postdoctorale Onderzoekersopleiding Demografie 2
1698
Published: 1930
Superior document: Reprint / Bell Telephone Laboratories B-446
1699
1700
Published: 2010
Superior document: RTI Press Publication BK-0001-1009