copyright 1970; Teledyne Post publishers; softbound; very good condition.
 
from Introduction -
The original VERSALOG slide rule was designed by engineers, for engineers.  Not merely an instrument for general computation, the VERSALOG was designed around the problems of engineering.  It has successfully provided both the practicing engineer and the student with a highly efficient and practical slide rule to match the high tempo of modern engineering development.  In keeping pace with the rapid advancement of engineering sophistication, the fine rule has been further improved to provide even greater efficiency and convenience...