Funk & Wagnalls Standard Reference Encyclopedia
Volume 20: Pori—Rhodesia
Wilfred Funk, Inc., portions copyright 1931, 1934–35, 1937, 1942, 1949, 1951–52, 1954–1964
Standard Reference Works Publishing Co., US, 1964 edition

Funk & Wagnalls Standard Reference Encyclopedia
Volume 19: P—Porgy
Wilfred Funk, Inc., portions copyright 1931, 1934–35, 1937, 1942, 1949, 1951–52, 1954–1964
Standard Reference Works Publishing Co., US, 1964 edition

Funk & Wagnalls Standard Reference Encyclopedia
Volume 18: Nevada—Ozone
Wilfred Funk, Inc., portions copyright 1931, 1934–35, 1937, 1942, 1949, 1951–52, 1954–1964
Standard Reference Works Publishing Co., US, 1964 edition

Funk & Wagnalls Standard Reference Encyclopedia
Volume 17: Middle East—Neutron
Wilfred Funk, Inc., portions copyright 1931, 1934–35, 1937, 1942, 1949, 1951–52, 1954–1964
Standard Reference Works Publishing Co., US, 1964 edition

Funk & Wagnalls Standard Reference Encyclopedia
Volume 16: Longevity—Middle East
Wilfred Funk, Inc., portions copyright 1931, 1934–35, 1937, 1942, 1949, 1951–52, 1954–1964
Standard Reference Works Publishing Co., US, 1964 edition