USDA Farmers' Bulletin No. 1638,by J. Silver, W. E. Crouch, M. C. Betts 62608 [Full author: James Silver and W. E. Crouch and M. C. Betts] [Subtitle: Rat Proofing Buildings and Premises] [Link: http://www.gutenberg.org/6/2/6/0/62608 ] [Files: 62608-8.txt; 62608-h.htm] Thanks to Tom Cosmas Regards, Al