General Nature in 1970

Versuche Über Pflanzenhybriden by Mendel, Gregor

Indices by Gaius Plinius Secundus

Pacific Northwest Ferns and Their Allies by Taylor, Thomas M. C.

Beyond the River and the Bay: Some Observations on the State of the Canadian Northwest in 1811 with a View to Providing the Intending Settler with a by Ross, Eric