General Nature in 1970

Versuche Über Pflanzenhybriden by Mendel, Gregor

Indices by Gaius Plinius Secundus

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 an by Ross, Eric

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