WHERE IS A RESEARCH FRONTIER

[1] ACKERMAN, 1958, GEOGRAPHY FUNDAMENTA, P28

[2] Barrows HH, 1923, ANN ASSOC AM GEOGR, V13, P1

[3] BATES M, 1956, MANS ROLE CHANGING F, P1139

[4] BEER S, 1961, SYSTEMS RES DESIGN, P1

[5] BLAUT, 1961, PROFESSIONAL GEOGRAP, V13, P1

[6] OBJECT AND RELATIONSHIP [J]. PROFESSIONAL GEOGRAPHER, 1962, 14 (06) : 1 - 7

[7] BOULDING K, 1962, CONFLICT DEFENSE, P1

[8] GENERAL SYSTEMS-THEORY - THE SKELETON OF SCIENCE [J]. MANAGEMENT SCIENCE, 1956, 2 (03) : 197 - 208

[9] COLEMAN J, 1957, SOCIOMETRY, V20

[10] DARWIN CR, 1845, COMMUNICATION

[1] ACKERMAN, 1958, GEOGRAPHY FUNDAMENTA, P28

[2] Barrows HH, 1923, ANN ASSOC AM GEOGR, V13, P1

[3] BATES M, 1956, MANS ROLE CHANGING F, P1139

[4] BEER S, 1961, SYSTEMS RES DESIGN, P1

[5] BLAUT, 1961, PROFESSIONAL GEOGRAP, V13, P1

[6] OBJECT AND RELATIONSHIP [J]. PROFESSIONAL GEOGRAPHER, 1962, 14 (06) : 1 - 7

[7] BOULDING K, 1962, CONFLICT DEFENSE, P1

[8] GENERAL SYSTEMS-THEORY - THE SKELETON OF SCIENCE [J]. MANAGEMENT SCIENCE, 1956, 2 (03) : 197 - 208

[9] COLEMAN J, 1957, SOCIOMETRY, V20

[10] DARWIN CR, 1845, COMMUNICATION