Tongwen Guan was created in 1862.
Wattled Guan was created in 1828.
Andean Guan was created in 1856.
Black Guan was created in 1867.
Marail Guan was created in 1776.
Trinidad Piping Guan was created in 1784.
Chestnut-bellied Guan was created in 1870.
Sickle-winged Guan was created in 1828.
Dusky-legged Guan was created in 1815.
Tongwen Chen has written: 'Optimal sampled-data control systems' -- subject(s): Automatic control, Discrete-time systems
Black-fronted Piping Guan was created in 1825.
Tan Teck Guan Building was created in 1911.
Zhen Guan Chang Ge was created in 2006.