Hagen, A. An annotated list of grasshoppers (orthoptera, acrididae) from the eleven panhandle counties of Nebraska. Nebraska: University of Nebraska, 1970 60 p.
Hagen, A. An annotated list of grasshoppers (orthoptera, acrididae) from the eleven panhandle counties of Nebraska. Nebraska: University of Nebraska, 1970 60 p.
Hagen, A. (1970) An annotated list of grasshoppers (orthoptera, acrididae) from the eleven panhandle counties of Nebraska, Nebraska: University of Nebraska 60 p.
Hagen, A. (1970). An annotated list of grasshoppers (orthoptera, acrididae) from the eleven panhandle counties of Nebraska. Nebraska: University of Nebraska, 60 p.
Hagen A. An annotated list of grasshoppers (orthoptera, acrididae) from the eleven panhandle counties of Nebraska. Nebraska: University of Nebraska; 1970. p. 60 p.
