here's references on topo maps:

Topographic maps are an indispensable tool for understanding the
processes responsible for shaping the earth.  Susan Slaymaker, of
California State University, Sacramento, provides many topographic map
examples of symbols, from boundaries to vegetation types; landforms
expressed through geologic structures, igneous activity, mass movement,
streams, underground water, glaciers, wind, waves and currents; entire
topographic maps illustrating landforms; and stereo photographs.

Features of topographic maps (examples of symbols use) -
This web page has links to topographic map examples which illustrate
symbols commonly used on maps for cultural and natural features.

 http://www.csus.edu/indiv/s/slaymaker/Geol10L/topomap.htm

  "Landforms on topographic maps" links to examples of landforms
depicted on topographic maps.

  http://www.csus.edu/indiv/s/slaymaker/Geol10L/landforms.htm

  "Topographic Map Examples " has links to topographic maps which have
been selected to
  illustrate common geologic processes, cultural features and
topographic map symbols.

  http://www.csus.edu/indiv/s/slaymaker/Geol10L/wholemaps.htm

  "Classic Stereoviews of Geologic Features"

  http://www.csus.edu/indiv/s/slaymaker/stereoviews/stereoviews.htm

These sites are archived at RESOURCES FOR EARTH SCIENCE AND  GEOGRAPHY
INSTRUCTION at http://www.cmich.edu/~franc1m/homepage.htm  The links are

organized around the sequence of topics typically taught in an
introductory earth science or physical geography class. Links are also
available for environmental science, earth science/geography education,
career opportunities, and more. The sites selected are based on image
quality, ease with which lesson plans can be developed, organization,
authenticity, scope, and format.