کتاب های Robert Sommer
![A History of Atmospheric CO2 and Its Effects on Plants, Animals, and Ecosystems](http://cdn.ketabkoo.com/covers/1/156809-n.jpg)
A History of Atmospheric CO2 and Its Effects on Plants, Animals, and Ecosystems
Robert A. Berner (auth.), I.T. Baldwin, M.M. Caldwell, G. Heldmaier, Robert B. Jackson, O.L. Lange, H.A. Mooney, E.-D. Schulze, U. Sommer, James R. Ehleringer, M. Denise Dearing, Thure E. Cerling (eds.), 2005![Innovative management in the DARPA high altitude endurance unmanned aerial vehicle program: phase II experience](http://cdn.ketabkoo.com/covers/1/169320-n.jpg)
Innovative management in the DARPA high altitude endurance unmanned aerial vehicle program: phase II experience
Jeffrey A. Drezner, Geoffrey Sommer, Robert S. Leonard, United States. Defense Advanced Research Projects Agency, National Defense Research Institute (U.S.), 1999![Personal space; the behavioral basis of design.](http://cdn.ketabkoo.com/covers/13/1334912-n.jpg)