Outline is Representative of Size and Shape:
Name Details:
Identified By:  Philip J. Wilke and Meg McDonald
Named For:  Community near Type Site
Date Identified:  1986
Type Site:  Indian Hill Rockshelter (SDI-2537) San Diego County, California
Point Validity: Valid type

Wilke is an anthropologist and a professor at the University of California Riverside.  He has conducted extensive studies into the archaeology of California.  McDonald is the Circulation Manager for the Department of Anthropology at the University of California.  This type was named in a professional publication and has many professional references.  This is considered a valid type.
Dos Cabezas Side Notch
Cluster: Desert Side Notch Cluster
Description of Physical Characteristics and Flaking Pattern:
This is a small triangular point with a flattened cross section.   The blade is deeply serrated and my vary from slightly excurvate to straight.  The base is straight.  This point has a random flaking pattern.    
Size Measurements:

Data Needed / See Desert for similar sizes
Commonly Utilized Material:
Additional Comments:

This type is commonly mis-typed as Desert points on examples with deep serrations near the base or as Cottonwood Triangular on examples without the deep serrations (Justice, 2002).
Distribution:
Distribution Comments:

This point is primarily found in southwestern California and into northwestern Baja California, Mexico.
Age / Periods:
Date: 1,300 - 800 B.P.
Cultural Period: Developmental
Glacial Period: Vandal Minimum to Medieval
Warm
Culture:
Age Details:
Similar Points:
Cottonwood, Desert
Other points in this cluster / Related / Associated Points:
Bear River, Desert, Desert Delta, Desert Redding, Panoche
Pictures: 

Pictures Provided By:
 Dos Cabezas Projectile Point, Dos Cabezas Arrowhead
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References: (See Reference Page, Entry Number):

30, W1