Factors influencing the variance in sign learning performance by four juvenile Orangutans (Pongo pygmaeus) /
Shapiro, Gary Louis
Factors influencing the variance in sign learning performance by four juvenile Orangutans (Pongo pygmaeus) / by Gary Louis Shapiro - 1985 - 63 p. : ill. ; 22 cm.
Thesis (Ph.D.) - University of Oklahama, 1985
University of Oklahama--Dissertations
Orangutan
Sign language
Dissertations, Academic--Oklahoma
Factors influencing the variance in sign learning performance by four juvenile Orangutans (Pongo pygmaeus) / by Gary Louis Shapiro - 1985 - 63 p. : ill. ; 22 cm.
Thesis (Ph.D.) - University of Oklahama, 1985
University of Oklahama--Dissertations
Orangutan
Sign language
Dissertations, Academic--Oklahoma