Conserving natural resourses /

por Allen, Shirley Walter
Publicado 1966

Conserving natural resources : principle and practice in a democracy.

por Allen, Shirley Walter n. 1883, Allen, Shirley Walter n. 1883
Publicado 1959

Conserving natural resources : principles and practice in a democracy. /

por Allen, Shirley Walter n. 1883, Allen, Shirley Walter n. 1883
Publicado 1966

An Introduction to American forestry /

por Sharpe, Grant William, Sharpe, Grant William, Allen, Shirley Walter n. 1883
Publicado 1960

Introduction to forestry /

por Sharpe, Grant William, Sharpe, Grant William, Hendee, Clare Worden 1908-, Allen, Shirley Walter n. 1883
Publicado 1976