3 1 50 E. Bjorndal Primary Author M. Bjorndal Primary Author P.M. Pardalos Primary Author M. Ronnqvist Primary Author mixed material 978642120664 London. Springer 2010 environment & policy John fernie Additional Author alan S. pitkethly Additional Author mixed material london Harper & row 1982 Thomas Eugene avery Additional Author mixed material 0070025029 New York Library of congress cataloging 1967