TY - RPRT TI - Selecting islands and shoals for conservation based on biological and aesthetic criteria AU - M. G. Knutson AU - D.J. Leopold AU - R.C. Smardon PY - 1993 DO - 10.1007/bf02394690 UR - https://pubs.usgs.gov/publication/1003518 ID - 1003518 ER -