TI - BLack sand basin, yellowstone national park, july 2009 PT - JOUR DP - 2010 TA - Archives of Pediatrics & Adolescent Medicine pages = {991}, VI - 164 IP - 11 AID - 10.1001/archpediatrics.2010.205 [doi] 4100 - http://dx.doi.org/10.1001/archpediatrics.2010.205 SO - Archives of Pediatrics & Adolescent Medicine November 1, 2010 164(11):991