Shadbush : References

Bogardus, C. A. (1898). One thousand secrets of rich and wise men revealed. Aurora, IL: C.A. 

Brand, M. H. (2001, January 22). Picea abies. Retrieved from http://www.hort.uconn.edu/plants/p/picabi/picabi1.html

Brémaud, I. (2011). Acoustical properties of wood in string instruments, soundboards and tuned idiophones: biological and cultural diversity. Acoustical Society of America, 131(1), 807-818.

Characteristics. (2013) United States Department of Agriculture. Retrieved February 2013, from http://plants.usda.gov/java/charProfile?symbol=PIAB

Earle, C. (2012, November 28). Picea abies. Retrieved from http://www.conifers.org/pi/Picea_abies.php

Hosley, N. W. (1936). Norway spruce in the north-eastern united states: a study of existing plantations. Petersham, MA: Harvard Forest.

Johnson, H., & Grimshaw, J. (2010). The world of trees. Berkeley, CA: University of California Press.   

 Modulus of elasticity. (2010). In Word Net Search (3.1 edition). Retrieved from http://wordnetweb.princeton.edu/perl/webwn

Picea abies. (2011, August 16). US Forest Service. Retrieved February 2013, from http://www.fs.fed.us/database/feis/plants/tree/picabi/all.html#80

Seth, M. K. (2003). Trees and their economic importance. The Botanical Review, 69(4), 321-376.