Books by Orin Alva Stevens
Handbook of North Dakota plants
Poisonous plants and plant pro
Poisonous plants and plant products
Wild flowers of North Dakota
Wild flowers of North Dakota
Sweet clover seed studies
Sweet clover seed studies
The sow thistle
The sow thistle
New records and other notes on
New records and other notes on North Dakota plants
North Dakota weeds
North Dakota weeds
The geographical distribution
The geographical distribution of North Dakota plants