HAMILTON, P.B., M. POULIN, D.F. CHARLES, & M. ANGELL 1992 ("May") [postmarked Aug. 14] Americanarum Diatomarum Exsiccata: CANA, voucher slides from eight acidic lakes in northeastern North America Diatom Res. 7(1): 25-36, 4 tables + microfiche [list of determinations and description of localities]