Experimental Rotary Press Booklet Info Needed

I am looking for any information on the experimental rotary press booklets of 1917 from plates 7917, 7918 and 7960.

Any info would be greatly appreciated.

Some data can surely be found in this reference available from the USSS [ex-BIA]
BIA Plate Number Checklist: Plates 1-20,000, Revised 1990
compiled by Wallace Cleland.
Dates and usage of plates numbered 1-20,000 used for printing U.S. stamps. Over 800 pages and punched for three ring binder; shrink-wrapped.
Updates & Additions updated Sept. 2008.
I have a copy but it is in storage and temporarily lost!

chasa, Thanks, do you know if they list experimental plates? these plates were 153 subject and the and the stamps printed were never released for sale.