A systematic study of the genus Lessingia Cham. /
Howell, John Thomas
A systematic study of the genus Lessingia Cham. / by John Thomas Howell - Berkeley : University of California Press, 1929 - 44 p. : ill. ; 26 cm - University of California publications in botany ; 16 .
A systematic study of the genus Lessingia Cham. / by John Thomas Howell - Berkeley : University of California Press, 1929 - 44 p. : ill. ; 26 cm - University of California publications in botany ; 16 .