کتاب های Sheaffer
![Introduction to Agronomy Food, Crops, and Environment](http://cdn.ketabkoo.com/covers/9/900761-n.jpg)
Introduction to Agronomy Food, Crops, and Environment
Craig C. Sheaffer, 2011![Bad UFOs: Critical Thinking About UFO Claims](http://cdn.ketabkoo.com/covers/10/1050334-n.jpg)
Bad UFOs: Critical Thinking About UFO Claims
Mr. Robert Sheaffer, 2015![Psychic Vibrations](http://cdn.ketabkoo.com/covers/10/1050335-n.jpg)
Psychic Vibrations
Robert Sheaffer, Rob Pudim, 2013![Resentment against achievement : understanding the assault upon ability](http://cdn.ketabkoo.com/covers/11/1140404-n.jpg)
Resentment against achievement : understanding the assault upon ability
Sheaffer, Robert, 1988![Drop the Panties The Greyskull Guide to a Better Body](http://cdn.ketabkoo.com/covers/12/1224179-n.jpg)