Dolphin talk zalman usiskin creator author cathy hynes feldman author Copyright Collection (Library of Congress) moving image videorecording Documentary-Television series. xxu 1986 monographic eng 1 videocassette of 1 (VHS) : sd., col. ; 1/2 in. 1 videocassette of 1 (Betacam SP) : sd., col. ; 3/4 in. Copyright: National Geographic Explorer. Appl. au.: National Geographic Television. Prev. reg.: Audio & visual works preexisting. NM: all other cinematographic matrial. DCR 1986; PUB *1Jan87 (in notice: 1986); REG 05Apr99; PA1-012-108. No. 86A20. Sources used: copyright data sheet ; copyright data base ; Television Programming Source books series, (1999-2000). viewing copy; master ; VAK 7234 (viewing copy) VXB 7243 (master) 0673457451 2001643621 cuk 010702 20210315115206.0 12459052 eng.