1.	2000 Commercial Vegetable Production Recommendations - Pennsylvania.  Updated annually.  Available from local County Extension offices.
2.	Sorensen, K. A. and J. R. Baker  (eds).  1994.  Insect and Related Pests of Vegetables, AG-136, N.  Carolina Ag. Ext. Serv.  Dept. of Agricultural Communications North Carolina State University Raleigh, NC  27650  (price: $10.00) ph: 919 513 3112 fax: 919 515 8602
3.	Rick Foster and Brian Flood [eds].  1995.  Vegetable Insect Management with emphasis on the midwest.   206 pp.  ISBN 0-931682-52-2.  (price, about $30)  Meister Publishing Co. Willoughby, Ohio.  ph: 800 572 7740
4.	Adams, R. G. and J. C. Clark (eds).  Northeast Sweet Corn Production and IPM Manual.   (price, about $20) University of Connecticut Resource Center U-35 1376 Storrs Rd.,Storrs, CT  06269-4035 ph: 860 486 3336 fax: 860 486 0100
5.	Hoffmann, M. P. and A. C. Frodsham.  1993.  Natural enemies of  vegetable insect pests.  (price, about $20)  Cornell University Resource Center 7 Business/Technology Park Ithaca, NY  14850  ph: 607 255-2080 fax:  607 255-9946
6.	University of Maryland Pest Management Aids, PMA 1-11 (The Vegetable Set).  (These are the Color Pest ID sheets) (price, about $3.50)  University of Maryland  Agriculture Duplicating Services  6200 Sheridan Street  Riverdale, MD  20737  ph: 301 403-4264
7.	The Bad Guys! Insect Pests of Yards, Gardens and Agricultural Areas  1998.  Jeffords, M. R., S. L. Post, R. N. Wiedenmann, C. P. Nixon, and P. L. Nixon.  Set of 31 laminated color photos with descriptions. (price, $8.00) Illinois Natural History Survey Distribution Center Natural Resources Building 607 Peabody Dr. Champaigne, IL  61820  ph: 217 333 6880
8.	The Good Guys! Natural Enemies of Insects  1997.  Jeffords, M. R., S. L. Post, R. N. Wiedenmann, C. S. Sadoff, and C. P. Nixon.  Set of 31 laminated color photos with descriptions.  Illinois Natural History Survey, Distribution Center,  Natural Resources Building 607 Peabody Dr. Champaigne, IL  61820  ph: 217 333 6880   (price, $8.00)