Diaspididae of the World 2.0: The importance of cryptic species and specific identifications as related to biological control. Beltsville symposia in agricultural research. (2). Biosystematics in agriculture. Invited papers presented at a symposium held May 8-11, 1977 at the Beltsville Agricultural Research Center (BARC), Beltsville, Maryland 20705. Allanheld, Osmun and Co. Inc., New York, USA: 23-35.

Authors(s)	Rosen, D.
Year	1978
Title	The importance of cryptic species and specific identifications as related to biological control. Beltsville symposia in agricultural research. (2). Biosystematics in agriculture. Invited papers presented at a symposium held May 8-11, 1977 at the Beltsville Agricultural Research Center (BARC), Beltsville, Maryland 20705. Allanheld, Osmun and Co. Inc., New York, USA: 23-35.