Bip39 condensed pdf https://list.ly/i/11078004 Though it works by using BIP32 approach it is possible to even now import BIP39 seeds into Electrum wallet. Also aside from BIp32 There exists BIP44 Variation which some wallet use for the technology of seeds. This tends to provide you with vacant balances. That is https://ledbookmark.com/story5802860/bip39-min-js-download-the-smart-trick-of-bip39-wallet-that-no-one-is-discussing-https-t-me-bip39-chat