Land economics research;papers presented at a symposium held at Lincoln, Nebraska, June 16-23, 1961, under the joint sponsorship of Farm Foundation [and] Resources for the Future, inc

Land economics research;papers presented at a symposium held at Lincoln, Nebraska, June 16-23, 1961, under the joint sponsorship of Farm Foundation [and] Resources for the Future, inc , Land economics research;papers presented at a symposium held at Lincoln, Nebraska, June 16-23, 1961,... , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی