Cohort-specific measures of lifetime social security taxes and benefits /

"December 2007."

Identities: Of light and heat, of caloric and electricity ...

Mode of access: Internet.

Manual of botany for North America: containing generic and specific descriptions of the indigenous plants and common cultivated exotics, growing north of the gulf of Mexico.

pt. 1. North American plants, arranged according to the Linnean artificial method: improved by Persoon, Pursh, Nuttall, and others.--pt. 2. North American plants, arranged according to Jussieu's natural method; improved by Lindley, Brown, De Candolle and others.

Papers on mechanical and physical subjects,

Vol. 3 issued also separately for the Royal society of London.