Principles of heating, ventilating, and air conditioning : a textbook with design data based on the 1997 ASHRAE Handbook--Fundamentals /

by Howell, Robert W. 1916-, Howell, Robert W. 1916-, Sauer, Harry J., Coad, William J.
Published 1998

Exploitation of physiological and genetic variability to enhance crop productivity /

by Harper, James E., Harper, James E.
Published 1985