The following is slightly off topic, but has proven to be a useful tool.
 
I use the Advanced Book Exchange at www.abebooks.com. It indexes the lists of
something like 2500 used book dealers. There are similar services around the
net. What you get is a listing for the dealer who is selling the book. You
then contact the dealer directly. The service is free.
 
It produced sources for both titles.
 
It produced hits on both titles, 4 on AHP and 1 on IPCCP.
Disclaimer: I am in no way affiliated with abebooks, blah, blah, blah, just a
satisfied user, blah, blah, ..
 
Dan Jones
Mill Run, Pennsylvania
 
Roger Flanders wrote:
 
> Could anyone offer advice on where I might obtain copies of these two
> books: (1) S.E.McGregor's book "Insect Pollination of Cultivated Crop
> Plants," Agriculture Handbook No. 496 USDA, 1976, published by the
> Government Printing Office, but now out of print; and (2) "American Honey
> Plants" by F.C. Pellett?