http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
information on the breeding of Guppies, Swordtails, Mollies, and other livebears
by William Vorderwinkler ; illustrated by G.J.M. Timmerman.
"An instrctive booklet for beginning aquarists."