Historical clue formulations

• One way to order café — 2024-04-27
• Rio ___ (Amazon feeder) — 2015-06-10
• Part of U.N.C.F. — 2015-01-04
• Opposite of blanco — 2014-11-14
• Part of U.N.C.F. — 2008-12-10
• Rio ___, Amazon feeder — 2005-04-29
• South America's Rio ___ — 2004-05-09
• Rio ___, part of the Venezuela/ Colombia boundary — 2004-02-29
• The "N" of U.N.C.F. — 2002-06-20
• The "N" of U.N.C.F. — 2000-08-08
• The "N" of U.N.C.F. — 1996-11-14
• Part of U.N.C.F. — 1994-10-05
• Part of U.N.C.F. — 1994-03-17